The Siemens 5SU1156-1KV10 is an FI/LS combination unit — an RCD and MCB in one 1+N-pole module — rated C 10A overcurrent with a 10 mA Type AC residual-current trip and 6 kA breaking capacity. The 70 mm depth fits standard DIN-rail enclosures; the Type AC designation means it detects sinusoidal AC earth faults only, not pulsed DC or smooth DC, so it belongs on general-purpose socket circuits, not inverter-fed or EV-charger loads.
Siemens 5SU1156-1KV10 FI/LS Protector, Type AC, 10A, 10mA, 6
MPN5SU1156-1KV10
Siemens 5SU1156-1KV10 FI/LS protector, Type AC (WS), D=70mm, IΔn 10mA, 6kA, 1+N-pole, C 10A.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Product details
Frequently asked questions
What is the 5SU1156-1KV10 used for?
It is a combined residual-current device (RCD) and miniature circuit breaker (MCB) — an FI/LS protector — rated C 10A overcurrent, 10 mA Type AC residual trip, 6 kA breaking capacity, 1+N-pole. Use it on single-phase AC socket circuits where sinusoidal earth-fault protection at 10 mA is required, such as wet-area or medical socket outlets.
Where can I buy 5SU1156-1KV10?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer.
MPN
5SU1156-1KV10