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Siemens 5SM2626-8 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SM2626-8 SENTRON RCD, 2-pole, 63 A, 300 mA, Type A

Name: 5SM2626-8
Brand: Siemens
SKU: 5SM2626-8
Availability: LimitedAvailability
Author: Turnaround Tess

MPN5SM2626-8

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Siemens SENTRON 5SM2626-8, selective RCD unit, 2-pole, 63 A AC rated, 300 mA Type A, 2 MW, IP20, -40 to 75 °C.

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Siemens 5SM2626-8 datasheet (PDF)

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

Specifications

5SM2626-8 — Electrical Ratings
Parameter	Value
Number of poles	2
Overvoltage category	III

5SM2626-8 — Identification
Parameter	Value
Product designation	RCD-unit
Product design / construction	Selective

5SM2626-8 — Mechanical
Parameter	Value
Mounting position	any
Width in modular units	2
Maximum	75 °C
Minimum	-40 °C
Width	70 mm
Height	90 mm
Depth	70 mm
Installation depth	70 mm

5SM2626-8 — Environmental
Parameter	Value
IP degree of protection	IP20, if the distribution board is installed, with connected conductors

Product details

Selective RCD for feeder protection

It is designed for selective (time-delayed) tripping to coordinate with downstream RCDs — that means it holds during a downstream fault so only the branch trips, keeping the feeder live. The 300 mA threshold suits it for feeder or submain protection where a 30 mA unit would nuisance-trip on cable leakage.

Derating and thermal limits

At 40 °C the unit carries 58.6 A; at 70 °C it derates to 50.4 A. The full rated 63 A applies only at the reference ambient.

Coordination with 5SL4 breakers

This RCD is specified as a variation for 5SL4 miniature circuit breakers — it mounts directly onto the 5SL4 busbar stack without additional wiring. The 2-pole design and 70 mm depth match the 5SL4 footprint. If your BOM calls for a 5SL4 MCB, this RCD is the intended companion for selective earth-fault protection.