• Siemens SIRIUS 3RT20 Contactors Size S0, DC Coil (4-18.5 kW)
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Siemens SIRIUS 3RT20 Contactors Size S0, DC Coil (4-18.5 kW)

Siemens SIRIUS 3RT20 Contactors Size S0, DC Coil (4-18.5 kW)

SIRIUS 3RT202 3-pole power contactors in size S0 with DC solenoid coil for motors from 4 to 18.5 kW at 400 V.

Key features

  • Size S0, AC-3/AC-3e rated, IE3/IE4 ready
  • Ratings 9 to 38 A (4 to 18.5 kW at 400 V)
  • Versions with varistor or diode assembly plugged in at factory, removable auxiliary switch or voltage tap
  • Integrated 1 NO + 1 NC, or 2 NO + 2 NC with auxiliary switch
  • Screw terminals or spring-loaded terminals

Specifications

Brand line SIRIUS
Series 3RT20 power contactor
Poles 3 (main contacts)
Utilization AC-3 / AC-3e, IE3/IE4 ready
Mounting Screw / snap-on TH 35 DIN rail
Manufacturer Siemens
Product category Magnetic Contactors
Catalog chapter Contactors for switching motors
Catalog section SIRIUS 3RT contactors, 3-pole up to 250 kW
Source Siemens Catalog IC 10 · 2026, p. 181-182, 192
3RT2023-1BB40 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2023-2BB40 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2024-1BB40 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2024-2BB40 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2024-1BM40 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2024-2BM40 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2025-1BB40 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2025-2BB40 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2025-1BM40 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2025-2BM40 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2026-1BB40 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2026-2BB40 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2026-1BM40 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2026-2BM40 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2027-1BB40 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2027-2BB40 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2027-1BM40 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2027-2BM40 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2028-1BB40 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2028-2BB40 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2028-1BM40 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2028-2BM40 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2023-1DB40 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2023-2DB40 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2024-1DB40 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2024-2DB40 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2025-1DB40 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2025-2DB40 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2026-1DB40 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2026-2DB40 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2027-1DB40 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2027-2DB40 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2028-1DB40 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2028-2DB40 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2023-1FB40 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2023-2FB40 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2024-1FB40 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2024-2FB40 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2025-1FB40 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2025-2FB40 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2026-1FB40 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2026-2FB40 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2027-1FB40 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2027-2FB40 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2028-1FB40 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2028-2FB40 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2023-1BB44 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2023-2BB44 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2024-1BB44 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2024-2BB44 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2025-1BB44 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2025-2BB44 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2026-1BB44 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2026-2BB44 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2027-1BB44 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2027-2BB44 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2028-1BB44 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2028-2BB44 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2024-1DB44-3MA0 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, varistor
3RT2024-2DB44-3MA0 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, varistor
3RT2025-1DB44-3MA0 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, varistor
3RT2025-2DB44-3MA0 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, varistor
3RT2026-1DB44-3MA0 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, varistor
3RT2026-2DB44-3MA0 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, varistor
3RT2027-1DB44-3MA0 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, varistor
3RT2027-2DB44-3MA0 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, varistor
3RT2023-1FB44-3MA0 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2023-2FB44-3MA0 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2024-1FB44-3MA0 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2024-2FB44-3MA0 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2025-1FB44-3MA0 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2025-2FB44-3MA0 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2026-1FB44-3MA0 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2026-2FB44-3MA0 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2027-1FB44-3MA0 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2027-2FB44-3MA0 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2028-1FB44-3MA0 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2028-2FB44-3MA0 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2023-1BB40-0CC0 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2023-2BB40-0CC0 Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2024-1BB40-0CC0 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2024-2BB40-0CC0 Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2025-1BB40-0CC0 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2025-2BB40-0CC0 Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2026-1BB40-0CC0 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2026-2BB40-0CC0 Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2027-1BB40-0CC0 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2027-2BB40-0CC0 Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2028-1BB40-0CC0 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2028-2BB40-0CC0 Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
Magnetic ContactorsSiemens
90 product codes available in this family
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Siemens SIRIUS 3RT20 Contactors Size S0, DC Coil (4-18.5 kW)

Brand Siemens·Magnetic Contactors

Available part numbers (90)

3RT2023-1BB40, 3RT2023-2BB40, 3RT2024-1BB40, 3RT2024-2BB40, 3RT2024-1BM40, 3RT2024-2BM40, 3RT2025-1BB40, 3RT2025-2BB40, 3RT2025-1BM40, 3RT2025-2BM40 + 80 more — see full table ↓

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Product codeSpec
3RT2023-1BB40Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2023-2BB40Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2024-1BB40Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2024-2BB40Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2024-1BM40Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2024-2BM40Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2025-1BB40Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2025-2BB40Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2025-1BM40Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2025-2BM40Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2026-1BB40Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2026-2BB40Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2026-1BM40Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2026-2BM40Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2027-1BB40Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2027-2BB40Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2027-1BM40Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2027-2BM40Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2028-1BB40Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Standard
3RT2028-2BB40Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Standard
3RT2028-1BM40Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Screw | Version: Standard
3RT2028-2BM40Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 220 V DC | Connection: Spring-loaded | Version: Standard
3RT2023-1DB40Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2023-2DB40Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2024-1DB40Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2024-2DB40Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2025-1DB40Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2025-2DB40Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2026-1DB40Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2026-2DB40Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2027-1DB40Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2027-2DB40Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2028-1DB40Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Varistor plugged in
3RT2028-2DB40Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Varistor plugged in
3RT2023-1FB40Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2023-2FB40Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2024-1FB40Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2024-2FB40Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2025-1FB40Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2025-2FB40Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2026-1FB40Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2026-2FB40Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2027-1FB40Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2027-2FB40Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2028-1FB40Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: Diode assembly plugged in
3RT2028-2FB40Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Diode assembly plugged in
3RT2023-1BB44Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2023-2BB44Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2024-1BB44Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2024-2BB44Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2025-1BB44Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2025-2BB44Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2026-1BB44Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2026-2BB44Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2027-1BB44Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2027-2BB44Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2028-1BB44Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Removable aux. switch
3RT2028-2BB44Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Removable aux. switch
3RT2024-1DB44-3MA0Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, varistor
3RT2024-2DB44-3MA0Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, varistor
3RT2025-1DB44-3MA0Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, varistor
3RT2025-2DB44-3MA0Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, varistor
3RT2026-1DB44-3MA0Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, varistor
3RT2026-2DB44-3MA0Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, varistor
3RT2027-1DB44-3MA0Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, varistor
3RT2027-2DB44-3MA0Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, varistor
3RT2023-1FB44-3MA0Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2023-2FB44-3MA0Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2024-1FB44-3MA0Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2024-2FB44-3MA0Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2025-1FB44-3MA0Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2025-2FB44-3MA0Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2026-1FB44-3MA0Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2026-2FB44-3MA0Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2027-1FB44-3MA0Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2027-2FB44-3MA0Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2028-1FB44-3MA0Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Screw | Version: Perm. aux. switch + cover, diode
3RT2028-2FB44-3MA0Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 2 NO + 2 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: Perm. aux. switch + cover, diode
3RT2023-1BB40-0CC0Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2023-2BB40-0CC0Type: 3RT2023 (S0) | Rating: AC-3 9 A/4 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2024-1BB40-0CC0Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2024-2BB40-0CC0Type: 3RT2024 (S0) | Rating: AC-3 12 A/5.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2025-1BB40-0CC0Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2025-2BB40-0CC0Type: 3RT2025 (S0) | Rating: AC-3 17 A/7.5 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2026-1BB40-0CC0Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2026-2BB40-0CC0Type: 3RT2026 (S0) | Rating: AC-3 25 A/11 kW; AC-1 40 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2027-1BB40-0CC0Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2027-2BB40-0CC0Type: 3RT2027 (S0) | Rating: AC-3 32 A/15 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap
3RT2028-1BB40-0CC0Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Screw | Version: With voltage tap
3RT2028-2BB40-0CC0Type: 3RT2028 (S0) | Rating: AC-3 38 A/18.5 kW; AC-1 50 A | Aux. contacts: 1 NO + 1 NC | Coil: 24 V DC | Connection: Spring-loaded | Version: With voltage tap

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