• Siemens SIRIUS Time-Delay Auxiliary Switches 3RT2927 / 3RA281
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Siemens SIRIUS Time-Delay Auxiliary Switches 3RT2927 / 3RA281

Siemens SIRIUS Time-Delay Auxiliary Switches 3RT2927 / 3RA281

Pneumatic and solid-state time-delay auxiliary switches for mounting on SIRIUS 3RT2 contactors and 3RH2 contactor relays.

Key features

  • 3RT2927-2P pneumatic ON-/OFF-delay blocks for size S0, 1 NO + 1 NC
  • 3RA2813/3RA2814/3RA2815 solid-state ON-delay and OFF-delay (with/without control signal)
  • Wide voltage range 24 to 240 V AC/DC, time 0.05 to 100 s selectable, varistor integrated
  • Electrical connection to the contactor coil established automatically on snapping on
  • Screw terminals or spring-loaded terminals

Specifications

Brand line SIRIUS
Accessory for SIRIUS 3RT contactors / 3RH2 relays
Manufacturer Siemens
Product category Accessories
Catalog chapter Contactors for switching motors
Catalog section 3RT/3RH2 accessories: Auxiliary switches, delayed
Source Siemens Catalog IC 10 · 2026, p. 222
3RT2927-2PA01 Item: Pneumatic time-delay aux. switch | Function: ON-delay | Time range: 1-30 s | Contacts: 1 NO + 1 NC | Supply: Pneumatic (no supply) | Connection: Screw
3RT2927-2PA11 Item: Pneumatic time-delay aux. switch | Function: ON-delay | Time range: 10-180 s | Contacts: 1 NO + 1 NC | Supply: Pneumatic (no supply) | Connection: Screw
3RT2927-2PR01 Item: Pneumatic time-delay aux. switch | Function: OFF-delay | Time range: 1-30 s | Contacts: 1 NO + 1 NC | Supply: Pneumatic (no supply) | Connection: Screw
3RT2927-2PR11 Item: Pneumatic time-delay aux. switch | Function: OFF-delay | Time range: 10-180 s | Contacts: 1 NO + 1 NC | Supply: Pneumatic (no supply) | Connection: Screw
3RA2813-1AW10 Item: Solid-state time-delay aux. switch | Function: ON-delay | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Screw
3RA2813-2AW10 Item: Solid-state time-delay aux. switch | Function: ON-delay | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2813-1FW10 Item: Solid-state time-delay aux. switch | Function: ON-delay | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Screw
3RA2813-2FW10 Item: Solid-state time-delay aux. switch | Function: ON-delay | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2814-1AW10 Item: Solid-state time-delay aux. switch | Function: OFF-delay with control signal | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Screw
3RA2814-2AW10 Item: Solid-state time-delay aux. switch | Function: OFF-delay with control signal | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2814-1FW10 Item: Solid-state time-delay aux. switch | Function: OFF-delay with control signal | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Screw
3RA2814-2FW10 Item: Solid-state time-delay aux. switch | Function: OFF-delay with control signal | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2815-1AW10 Item: Solid-state time-delay aux. switch | Function: OFF-delay w/o control signal | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Screw
3RA2815-2AW10 Item: Solid-state time-delay aux. switch | Function: OFF-delay w/o control signal | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2815-1FW10 Item: Solid-state time-delay aux. switch | Function: OFF-delay w/o control signal | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Screw
3RA2815-2FW10 Item: Solid-state time-delay aux. switch | Function: OFF-delay w/o control signal | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Spring-loaded
AccessoriesSiemens
16 product codes available in this family
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Siemens SIRIUS Time-Delay Auxiliary Switches 3RT2927 / 3RA281

Brand Siemens·Accessories

Available part numbers (16)

3RT2927-2PA01, 3RT2927-2PA11, 3RT2927-2PR01, 3RT2927-2PR11, 3RA2813-1AW10, 3RA2813-2AW10, 3RA2813-1FW10, 3RA2813-2FW10, 3RA2814-1AW10, 3RA2814-2AW10 + 6 more — see full table ↓

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Product codes & specifications
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Product codeSpec
3RT2927-2PA01Item: Pneumatic time-delay aux. switch | Function: ON-delay | Time range: 1-30 s | Contacts: 1 NO + 1 NC | Supply: Pneumatic (no supply) | Connection: Screw
3RT2927-2PA11Item: Pneumatic time-delay aux. switch | Function: ON-delay | Time range: 10-180 s | Contacts: 1 NO + 1 NC | Supply: Pneumatic (no supply) | Connection: Screw
3RT2927-2PR01Item: Pneumatic time-delay aux. switch | Function: OFF-delay | Time range: 1-30 s | Contacts: 1 NO + 1 NC | Supply: Pneumatic (no supply) | Connection: Screw
3RT2927-2PR11Item: Pneumatic time-delay aux. switch | Function: OFF-delay | Time range: 10-180 s | Contacts: 1 NO + 1 NC | Supply: Pneumatic (no supply) | Connection: Screw
3RA2813-1AW10Item: Solid-state time-delay aux. switch | Function: ON-delay | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Screw
3RA2813-2AW10Item: Solid-state time-delay aux. switch | Function: ON-delay | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2813-1FW10Item: Solid-state time-delay aux. switch | Function: ON-delay | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Screw
3RA2813-2FW10Item: Solid-state time-delay aux. switch | Function: ON-delay | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2814-1AW10Item: Solid-state time-delay aux. switch | Function: OFF-delay with control signal | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Screw
3RA2814-2AW10Item: Solid-state time-delay aux. switch | Function: OFF-delay with control signal | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2814-1FW10Item: Solid-state time-delay aux. switch | Function: OFF-delay with control signal | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Screw
3RA2814-2FW10Item: Solid-state time-delay aux. switch | Function: OFF-delay with control signal | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2815-1AW10Item: Solid-state time-delay aux. switch | Function: OFF-delay w/o control signal | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Screw
3RA2815-2AW10Item: Solid-state time-delay aux. switch | Function: OFF-delay w/o control signal | Time range: 0.05-100 s | Contacts: 1 CO | Supply: 24-240 V AC/DC | Connection: Spring-loaded
3RA2815-1FW10Item: Solid-state time-delay aux. switch | Function: OFF-delay w/o control signal | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Screw
3RA2815-2FW10Item: Solid-state time-delay aux. switch | Function: OFF-delay w/o control signal | Time range: 0.05-100 s | Contacts: 1 NO + 1 NC | Supply: 24-240 V AC/DC | Connection: Spring-loaded

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