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Siemens 5SM2623-6 — Residual Current Breakers (RCCB/RCBO)

Siemens SENTRON 5SM2623-6 RCD Unit, 2-pole, 40 A, 300 mA, 23

MPN5SM2623-6
Active

Siemens SENTRON RCD-unit, 2-pole, Type A, In: 40 A, 300 mA, Un AC: 230 V, 50 Hz, 2 MW, IP20, instantaneous.

Siemens 5SM2623-6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SM2623-6 — Electrical Ratings
ParameterValue
Number of poles2
Overvoltage categoryIII
5SM2623-6 — Identification
ParameterValue
Product designationRCD-unit
Product design / constructioninstantaneous
5SM2623-6 — Mechanical
ParameterValue
Mounting positionany
Width in modular units2
Maximum45 °C
Minimum-25 °C
Width70 mm
Height90 mm
Depth70 mm
Installation depth70 mm
5SM2623-6 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors

Product details

The Siemens SENTRON 5SM2623-6 is a 2-pole residual current device (RCD unit) rated 40 A, 300 mA fault current, Type A, for 230 V AC at 50 Hz. It is an instantaneous-trip design — no adjustable delay — intended for use with the 5SL4 series MCB to form an RCBO combination in a distribution board.

Rated at 40 A continuous and 300 mA residual trip threshold, Type A detects pulsating DC fault currents as well as sinusoidal AC — required on circuits feeding single-phase rectified loads (switch-mode supplies, variable-speed drives, LED drivers). The 230 V AC / 50 Hz supply voltage is fixed; the unit is not rated for 60 Hz or mixed-frequency networks.

Installation and environmental limits

Mounts on DIN rail (REG fastening method) in any orientation. IP20 protection applies only when the distribution board is installed and conductors are connected — not a standalone outdoor rating. The 2 MW width (36 mm per module) occupies two adjacent slots in a standard 18 mm pitch enclosure. Sealable? No — the test button and reset are accessible without a seal cap.

Frequently asked questions

What is the 5SM2623-6 used for?

It is a residual current device (RCD) for 2-pole, 230 V AC, 50 Hz circuits. Combined with a 5SL4 series MCB it forms an RCBO providing both overcurrent and earth-fault protection in a distribution board.

Where can I buy the 5SM2623-6?

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

Will the 5SM2623-6 drop into a panel specified around the 5SU9354-7KK16?

Not without rewiring. The 5SM2623-6 is a bare RCD unit (2 MW, 70 mm depth) while the 5SU9354-7KK16 is an RCBO (1P+N, 36 mm width, 77 mm depth) with integral overcurrent protection. The footprint differs, and the 5SU9354-7KK16 includes a neutral pole and a C-curve MCB — the 5SM2623-6 does not.

MPN
5SM2623-6