• Siemens SENTRON 5SM2 RC Units 4-pole (Type A, AC)
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Siemens SENTRON 5SM2 RC Units 4-pole (Type A, AC)

Siemens SENTRON 5SM2 RC Units 4-pole (Type A, AC)

Siemens 5SM2 4-pole RC units for assembly with 5SY, 5SL4 or 5SP4 miniature circuit breakers to form a residual current operated circuit breaker.

Key features

  • Add-on RC units for 5SY, 5SL4 and 5SP4 miniature circuit breakers (B and C characteristics for 5SP4)
  • Types A, AC; instantaneous, super resistant [K], selective [S] and SIGRES versions
  • Rated residual currents from 10 mA to 1000 mA; rated current ranges 0.3 … 40 A, 0.3 … 63 A and 80 … 100 A
  • Combinable with auxiliary switches, fault signal contacts, shunt trips and undervoltage releases
  • Not suitable for use with 5SY5 (and type A/F not with 5SY8) miniature circuit breakers

Specifications

Series SENTRON 5SM2 RC unit
Poles 4-pole
Rated voltage 400 V AC
Rated frequency 50/60 Hz
Ambient temperature -25 … +45 °C
Storage temperature -40 … +75 °C
Source Siemens Catalog LV 10 · 2026, p. 4/38-4/39
5SM2342-6 For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2342-6KK01 For MCB: 5SY | Version: Super resistant [K] | Type: A | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2345-6 For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2345-6KK01 For MCB: 5SY | Version: Super resistant [K] | Type: A | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2345-6KK12 For MCB: 5SY | Version: SIGRES, instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2445-6 For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 100 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2642-6 For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2645-6 For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2645-8 For MCB: 5SY | Version: Selective [S] | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2645-6KK12 For MCB: 5SY | Version: SIGRES, instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2745-6 For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 500 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2745-8 For MCB: 5SY | Version: Selective [S] | Type: A | IΔn: 500 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2842-8 For MCB: 5SY | Version: Selective [S] | Type: A | IΔn: 1000 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2845-8 For MCB: 5SY | Version: Selective [S] | Type: A | IΔn: 1000 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2342-0 For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2345-0 For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2642-0 For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2645-0 For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2645-2 For MCB: 5SY | Version: Selective [S] | Type: AC | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2745-0 For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 500 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2845-2 For MCB: 5SY | Version: Selective [S] | Type: AC | IΔn: 1000 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2343-6 For MCB: 5SL4 | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2346-6 For MCB: 5SL4 | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2347-6 For MCB: 5SP4 | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2643-6 For MCB: 5SL4 | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2646-6 For MCB: 5SL4 | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2646-8 For MCB: 5SL4 | Version: Selective [S] | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2647-6 For MCB: 5SP4 | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2647-8 For MCB: 5SP4 | Version: Selective [S] | Type: A | IΔn: 300 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2847-8 For MCB: 5SP4 | Version: Selective [S] | Type: A | IΔn: 1000 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2343-0 For MCB: 5SL4 | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2346-0 For MCB: 5SL4 | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2347-0 For MCB: 5SP4 | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2643-0 For MCB: 5SL4 | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2646-0 For MCB: 5SL4 | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2646-2 For MCB: 5SL4 | Version: Selective [S] | Type: AC | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2647-0 For MCB: 5SP4 | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 80 … 100 A | Mounting width: 5 MW
Residual Current DevicesSiemens
37 product codes available in this family
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Siemens SENTRON 5SM2 RC Units 4-pole (Type A, AC)

Brand Siemens·Residual Current Devices

Available part numbers (37)

5SM2342-6, 5SM2342-6KK01, 5SM2345-6, 5SM2345-6KK01, 5SM2345-6KK12, 5SM2445-6, 5SM2642-6, 5SM2645-6, 5SM2645-8, 5SM2645-6KK12 + 27 more — see full table ↓

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Product codeSpec
5SM2342-6For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2342-6KK01For MCB: 5SY | Version: Super resistant [K] | Type: A | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2345-6For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2345-6KK01For MCB: 5SY | Version: Super resistant [K] | Type: A | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2345-6KK12For MCB: 5SY | Version: SIGRES, instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2445-6For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 100 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2642-6For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2645-6For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2645-8For MCB: 5SY | Version: Selective [S] | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2645-6KK12For MCB: 5SY | Version: SIGRES, instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2745-6For MCB: 5SY | Version: Instantaneous | Type: A | IΔn: 500 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2745-8For MCB: 5SY | Version: Selective [S] | Type: A | IΔn: 500 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2842-8For MCB: 5SY | Version: Selective [S] | Type: A | IΔn: 1000 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2845-8For MCB: 5SY | Version: Selective [S] | Type: A | IΔn: 1000 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2342-0For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2345-0For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2642-0For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2645-0For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2645-2For MCB: 5SY | Version: Selective [S] | Type: AC | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2745-0For MCB: 5SY | Version: Instantaneous | Type: AC | IΔn: 500 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2845-2For MCB: 5SY | Version: Selective [S] | Type: AC | IΔn: 1000 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2343-6For MCB: 5SL4 | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2346-6For MCB: 5SL4 | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2347-6For MCB: 5SP4 | Version: Instantaneous | Type: A | IΔn: 30 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2643-6For MCB: 5SL4 | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2646-6For MCB: 5SL4 | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2646-8For MCB: 5SL4 | Version: Selective [S] | Type: A | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2647-6For MCB: 5SP4 | Version: Instantaneous | Type: A | IΔn: 300 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2647-8For MCB: 5SP4 | Version: Selective [S] | Type: A | IΔn: 300 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2847-8For MCB: 5SP4 | Version: Selective [S] | Type: A | IΔn: 1000 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2343-0For MCB: 5SL4 | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2346-0For MCB: 5SL4 | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2347-0For MCB: 5SP4 | Version: Instantaneous | Type: AC | IΔn: 30 mA | In: 80 … 100 A | Mounting width: 5 MW
5SM2643-0For MCB: 5SL4 | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 0.3 … 40 A | Mounting width: 3 MW
5SM2646-0For MCB: 5SL4 | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2646-2For MCB: 5SL4 | Version: Selective [S] | Type: AC | IΔn: 300 mA | In: 0.3 … 63 A | Mounting width: 3 MW
5SM2647-0For MCB: 5SP4 | Version: Instantaneous | Type: AC | IΔn: 300 mA | In: 80 … 100 A | Mounting width: 5 MW

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