Skip to main content
Log in
Siemens 5SU1353-7KV40 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SU1353-7KV40 FI/LS RCBO Type A, 40A C-curve, 30mA,

MPN5SU1353-7KV40

Siemens 5SU1353-7KV40 FI/LS protector, Type A (PSE/SSF), 40A C-curve, 30mA residual current, 4.5kA breaking capacity, 1+N pole, D=70mm.

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

Product details

The Siemens 5SU1353-7KV40 is a combined residual-current device and miniature circuit breaker (RCBO) — an FI/LS protector in Siemens' 5SU1 family. It carries Type A sensitivity (PSE/SSF marking), rated residual current IΔn of 30 mA, and a 4.5 kA short-circuit breaking capacity. The 1+N-pole format switches the line conductor and monitors the neutral; the 70 mm width (4 module spaces) fits standard DIN-rail enclosures.

In a distribution board, it occupies the same footprint as a 1+N MCB plus an RCCB, but in a single housing — saving one module of rail space over a two-device solution. The Type A residual detection covers pulsating DC fault currents from rectified loads (switched-mode supplies, variable-speed drives, LED drivers), which a simple AC-type RCD would miss.

Frequently asked questions

What does the Type A (PSE/SSF) marking mean on this RCBO?

Type A sensitivity detects sinusoidal AC residual currents and pulsating DC residual currents up to 6 mA smooth DC — covering the fault signature from single-phase rectifiers, switch-mode power supplies, and phase-angle-controlled loads. The PSE/SSF notation is a Siemens internal code for the variant with enhanced surge immunity (PSE = pulse surge endurance, SSF = surge strength factor).

Where can I buy the 5SU1353-7KV40 and how is it quoted?

This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or price is carried on this listing.

MPN
5SU1353-7KV40