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Siemens 5SM9426-0 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SM9426-0 SENTRON RC Unit, 2P 63A 100mA AC

MPN5SM9426-0

Siemens SENTRON 5SM9426-0 RC unit electronic for 5SL4, 2-pole, type AC, In: 63 A, 100 mA, Un AC: 400 V, DIN rail mount.

Siemens 5SM9426-0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SM9426-0 — Electrical Ratings
ParameterValue
Number of poles2
Overvoltage categoryIII
5SM9426-0 — Identification
ParameterValue
Product designationRC unit electronic for 5SL4
Product design / constructionInstantaneous
5SM9426-0 — Mechanical
ParameterValue
Mounting positionany
Width36 mm
Height100 mm
Depth70 mm
Installation depth70 mm
5SM9426-0 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors

Product details

The Siemens 5SM9426-0 is a SENTRON residual current (RC) unit — the electronic trip module that pairs with a 5SL4 miniature circuit breaker to form a combined RCD/MCB (RCBO) assembly. It is a 2-pole, type AC device rated at 63 A with a 100 mA residual tripping threshold, supplied at 230/400 V AC.

It clips to the top of a 5SL4 miniature circuit breaker — the supply feeds in from above, through the RC unit, then to the MCB below. The assembly fits enclosures meeting DIN 43880 size 1. Terminal torque is 2.5 to 3 N·m. The IP20 rating applies only when the distribution board is installed with conductors connected — bare units on the bench are not touch-safe.

Wire sizing and termination

Accepts solid conductors from 0.75 to 35 mm² and stranded conductors from 0.75 to 25 mm². This range covers most sub-main and feeder circuits up to 63 A. The screw terminals are rated for the full 63 A continuous current without derating at the 55 °C ambient upper limit.

Frequently asked questions

How do I get current pricing and availability for 5SM9426-0?

Submit an RFQ against this order code. The part is sourced through independent distribution; pricing and stock levels are confirmed at quote time and are not published here.

Will 5SM9426-0 drop into a panel specified around 5SL6563-7BB?

No, it will not drop in as a direct mechanical substitute. The 5SM9426-0 is an RC unit designed to clip onto a 5SL4 MCB, while the 5SL6563-7BB is a standalone miniature circuit breaker. The 5SM9426-0 has a 70 mm depth and 36 mm width versus the 5SL6563-7BB's 76 mm depth and 36 mm width, but the mounting interface and function are different — one is a residual current module, the other a complete MCB. Rewiring would be required.

What is the listed depth and solid conductor range for 5SM9426-0?

Depth is 70 mm. Solid conductor range is 0.75 to 35 mm². Stranded range is 0.75 to 25 mm².

What compliance documentation does Siemens provide for 5SM9426-0?

The part carries overvoltage category III per IEC/EN 60947. It is silicon-free and identified per DIN EN 61346-2 and DIN EN 81346-2 as function letter F. The IP20 rating is conditional on installation in a distribution board with connected conductors.

MPN
5SM9426-0