The Siemens 5SU1653-1KV40 is a combined residual-current device and miniature circuit breaker (RCBO) — an FI/LS protector. It has Type AC earth-leakage detection (300 mA sensitivity) and a 40 A C-curve overcurrent trip in a 1+N-POL module. The 4.5 kA breaking capacity covers most domestic and light commercial sub-distribution boards; the 70 mm depth fits existing enclosures.
Siemens 5SU1653-1KV40 FI/LS Protector, Type AC, 40A C, 300mA
MPN5SU1653-1KV40
Siemens 5SU1653-1KV40 FI/LS protector, Type AC (WS), 1+N-POL, C 40A, IΔn 300mA, 4.5kA, D=70mm.
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MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
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MPN
5SU1653-1KV40