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Siemens 5SU9356-7CR40 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SU9356-7CR40 RCBO, Type A, 30 mA, C-Char 40 A, 6 kA

MPN5SU9356-7CR40

Siemens 5SU9356-7CR40 RCBO, 1P+N, Type A, 30 mA, C-Char, In: 40 A, Icn: 6 kA, Un AC: 230 V.

Siemens 5SU9356-7CR40 datasheet (PDF)
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026

Product details

What the ratings mean on the line

The Siemens 5SU9356-7CR40 is a single-module RCBO combining overcurrent protection and 30 mA residual current detection in one DIN-rail unit. The Type A trip characteristic means it catches pulsating DC fault currents as well as sinusoidal AC — common on modern electronics, drives, and switched-mode supplies found in control panels. The 6 kA breaking capacity (Icn) at 230 V AC is sized for final subcircuits in a standard distribution board; it interrupts a hard short without welding contacts or cascading damage upstream.

Deployment context

Snap-on DIN-rail mounting for a standard 18 mm module width. The 1P+N format protects one phase and switches the neutral — typical for single-phase final circuits in residential, commercial, or light-industrial distribution boards where an RCD and MCB are combined to save rail space.

Frequently asked questions

What is the rated breaking capacity of 5SU9356-7CR40?

The rated short-circuit breaking capacity (Icn) is 6 kA at 230 V AC, suitable for standard final subcircuits in distribution boards.

What type of residual current does the 5SU9356-7CR40 detect?

It is a Type A RCBO, so it detects sinusoidal AC residual currents and pulsating DC residual currents — covering the fault patterns from rectifiers, drives, and switched-mode power supplies.

Where can I buy 5SU9356-7CR40?

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

MPN
5SU9356-7CR40