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Siemens 5SM3312-0FB — Residual Current Breakers (RCCB/RCBO)

Siemens 5SM3312-0FB SENTRON RCCB, 25A, 2-Pole, 230V AC, 10kA

MPN5SM3312-0FB

Siemens SENTRON 5SM3 series, RCCB (residual current circuit breaker), 2-pole, 25 A rated at 230 V AC, 10 kA short-circuit current rating, Type AC, instantaneous.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SM3312-0FB — Electrical Ratings
ParameterValue
Number of poles2
Overvoltage categoryIII
5SM3312-0FB — Identification
ParameterValue
Product designationRCCB
Product design / constructionInstantaneous
5SM3312-0FB — Mechanical
ParameterValue
Mounting positionany
Maximum45 °C
Minimum-5 °C
Width36 mm
Height90 mm
Depth70 mm
Installation depth70 mm
5SM3312-0FB — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors

Product details

The Siemens SENTRON 5SM3312-0FB is a 2-pole residual current circuit breaker (RCCB) rated at 25 A on 230 V AC, 50 Hz.

Current-carrying capacity and thermal derating

Above that it derates: 23.5 A at 50 °C, 22 A at 55 °C, 20.5 A at 60 °C, 19 A at 65 °C, and 17.5 A at 70 °C.

The 5SM3312-0FB occupies 2 width units (36 mm wide) on a DIN rail, with a depth of 70 mm and a height of 90 mm. That 70 mm depth includes the body — it doesn't need extra clearance behind it for wiring, but the IP20 rating only applies once the distribution board is installed and conductors are connected.

Frequently asked questions

What are the key ratings of 5SM3312-0FB?

It's a 2-pole RCCB rated 25 A at 230 V AC, 50 Hz, with a 10 kA short-circuit current rating. It's Type AC (sinusoidal residual current only), instantaneous trip, and derates from 25 A at 40 °C to 17.5 A at 70 °C.

Where can I buy 5SM3312-0FB and get current pricing?

This part is 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.

Will 5SM3312-0FB drop into a panel specified around 5SU9354-7KK16 without rewiring?

Both are 2-pole RCCBs on DIN rail, but the 5SU9354-7KK16 is a different SENTRON series with different trip characteristics and ratings. The 5SM3312-0FB is 36 mm wide (2 width units) with a 70 mm depth, so it fits the same DIN-rail footprint, but verify the terminal layout and busbar compatibility before swapping — the supply position is top or bottom on this unit, which matches most panels.

MPN
5SM3312-0FB