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Siemens 5SM3647-0 — Residual Current Breakers (RCCB/RCBO)

Siemens SENTRON 5SM3647-0 RCCB, 4P, 80 A, 300 mA, AC type

MPN5SM3647-0

Siemens SENTRON 5SM3 series RCCB, 4-pole, 80 A rated current, 300 mA AC type, 400 V, 10 kA short-circuit rating, DIN rail mount.

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

5SM3647-0 — Electrical Ratings
ParameterValue
Number of poles4
Overvoltage categoryIII
5SM3647-0 — Identification
ParameterValue
Product designationRCCB
Product design / constructionInstantaneous
5SM3647-0 — Mechanical
ParameterValue
Mounting positionany
Width72 mm
Height90 mm
Depth77 mm
Installation depth70 mm
5SM3647-0 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors

Product details

The Siemens SENTRON 5SM3647-0 is a 4-pole residual current circuit breaker (RCCB) rated for 80 A at 40 °C ambient, tripping at 300 mA residual current, AC type, for 400 V AC 50 Hz systems. It carries a 10 kA short-circuit current rating and mounts on DIN rail (REG) — standard for panel integration in distribution boards.

The 80 A rating holds at 40 °C and 45 °C without derating; at 50 °C it drops to 76.8 A, and at 70 °C to 64 A — so if the panel runs hot, the continuous load must be reduced accordingly. The 300 mA AC-type trip is instantaneous (no short-time delay), meaning it clears earth faults fast but will nuisance-trip on equipment with high-frequency leakage (VFDs, switching supplies). For those loads, an AC-type RCCB is not the right choice — you would need an A or B type.

Frequently asked questions

Who supplies 5SM3647-0 and how is it quoted?

The part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability.

What is the closest functional second-source for 5SM3647-0?

The 5SL4363-7 is a peer within the SENTRON family but is a 4-pole MCB (miniature circuit breaker), not an RCCB — it provides overcurrent protection, not earth-fault protection. They are not drop-in substitutes; the 5SM3647-0 is the RCCB for residual current protection, while the 5SL4363-7 handles overload and short-circuit protection. For a complete panel, they often sit side by side on the same DIN rail.

What is the depth of 5SM3647-0?

The overall depth is 77 mm, with an installation depth of 70 mm.

What conductor sizes does 5SM3647-0 accept?

It accepts solid and stranded conductors from 1.5 mm² up to 25 mm².

Will 5SM3647-0 drop into a panel specified around 5SL4363-7?

Both mount on DIN rail and share the same 72 mm width per 4 width units, so the physical footprint is compatible. However, the 5SM3647-0 is an RCCB (residual current protection) while the 5SL4363-7 is an MCB (overcurrent protection) — they serve different protection functions and are not electrically interchangeable. A panel designed for an MCB cannot simply swap in an RCCB without rewiring the earth-fault detection circuit.

MPN
5SM3647-0