Skip to main content
Log in
Siemens 5SM9323-6 — Residual Current Breakers (RCCB/RCBO)

Siemens SENTRON 5SM9323-6 RC Unit, 2P, Type A, 40 A, 30 mA

MPN5SM9323-6

Siemens SENTRON RC unit for 5SL4, 2-pole, Type A, In: 40 A, 30 mA, Un AC: 400 V.

Siemens 5SM9323-6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SM9323-6 — Electrical Ratings
ParameterValue
Number of poles2
Overvoltage categoryIII
5SM9323-6 — Identification
ParameterValue
Product designationRC unit electronic for 5SL4
Product design / constructionInstantaneous
5SM9323-6 — Mechanical
ParameterValue
Mounting positionany
Width in modular units2
Maximum55 °C
Minimum-25 °C
Width36 mm
Height100 mm
Depth70 mm
Installation depth70 mm
5SM9323-6 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors

Product details

The Siemens SENTRON 5SM9323-6 is an electronic residual current (RC) unit designed to mount above a 5SL4 miniature circuit breaker, forming a combined RCBO in two modular width units (36 mm).

The 70 mm installation depth matches the 5SL4 breaker it sits above, keeping the assembly flush on the rail. IP20 rating applies once the distribution board cover is fitted and conductors are connected — this is a panel-interior component, not a standalone enclosure. The supply cord connects at the top, above the miniature circuit breaker, per the standard SENTRON busbar arrangement. Rated for 50 Hz supply frequency.

Frequently asked questions

What is the 5SM9323-6 used for?

It is an electronic RC unit that mounts above a Siemens 5SL4 miniature circuit breaker to create a combined residual current circuit breaker with overcurrent protection (RCBO). It provides Type A residual current detection at 30 mA sensitivity for personal protection in 40 A, 400 V AC final circuits.

Where can I buy the 5SM9323-6?

This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time.

Will 5SM9323-6 drop into a panel specified around 5SL6550-7BB?

No — the 5SM9323-6 is an RC unit for the 5SL4 breaker platform, while the 5SL6550-7BB is a standalone miniature circuit breaker. They serve different functions and are not drop-in substitutes without rewiring the residual current protection scheme.

MPN
5SM9323-6