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Siemens 5SM3646-6BA — Residual Current Breakers (RCCB/RCBO)

Siemens 5SM3646-6BA SENTRON RCCB, 4P, 63 A, 300 mA, Type A

MPN5SM3646-6BA

Siemens SENTRON 5SM3646-6BA, 4-pole RCCB, Type A, 63 A, 300 mA, 400 V AC, instantaneous, 10 kA SCCR.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SM3646-6BA — Electrical Ratings
ParameterValue
Number of poles4
Overvoltage categoryIII
5SM3646-6BA — Identification
ParameterValue
Product designationRCCB
Product design / constructionInstantaneous
5SM3646-6BA — Mechanical
ParameterValue
Mounting positionany
Width in modular units4
Maximum45 °C
Minimum-25 °C
Installation depth70 mm
5SM3646-6BA — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors
5SM3646-6BA — Electrical
ParameterValue
Operational current / at AC / rated value63 A

Product details

RCCB for 4-wire systems, Type A sensitivity

The Siemens 5SM3646-6BA is a 4-pole residual current circuit breaker (RCCB) from the SENTRON family, rated 63 A at 400 V AC with a 300 mA trip threshold and Type A residual current sensitivity. Type A detection covers sinusoidal AC fault currents plus pulsating DC fault currents — the standard for circuits with single-phase rectifiers, switching power supplies, or variable-speed drives downstream.

Snaps onto DIN rail (REG) per, occupying 4 modular width units (4 MW) at a 70 mm installation depth. IP20 with conductors connected, so it lives inside a closed panel or distribution box, not exposed to washdown.

Ambient limits and storage range

Operating ambient spans -25 °C to 45 °C; storage extremes are -40 °C to 75 °C.

Frequently asked questions

What is the closest functional second-source for 5SM3646-6BA?

The 5SU9354-7KK16 is a 2-pole RCBO (RCD + MCB combined) with Type A sensitivity and a 10 kA SCCR, but it is a 1P+N device rated 230/240 V, not a 4-pole RCCB at 400 V. It does not drop in as a form-fit replacement — the pole count, voltage rating, and physical width (2 MW vs 4 MW) differ. For a 4-pole RCCB application, the 5SM3646-6BA is the correct SENTRON part.

What are the key ratings for 5SM3646-6BA?

Rated operational current 63 A at 400 V AC, 4-pole, Type A residual current, 300 mA trip threshold, instantaneous (no short-time delay), 10 kA SCCR per IEC 61008-1 and 0.8 kA per EN 60898.

Where can I buy 5SM3646-6BA and how is it quoted?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

MPN
5SM3646-6BA