The Siemens 5SU1654-7KV10 is an FI/LS combination unit — a residual-current device (RCD) and miniature circuit breaker (MCB) in one 1+N-pole module. It's rated Type A (sensitive to pulsating DC fault currents up to 300 mA), with a 10 A C-curve overcurrent trip and a 10 kA breaking capacity. The 70 mm depth is standard for DIN-rail enclosures; the C-curve means it's sized for general-purpose and motor-starting loads where inrush is moderate.
What the ratings mean for fit
Type A detection handles sinusoidal AC faults and pulsating DC faults up to 300 mA — that covers most modern electronics (SMPS, LED drivers, VFDs) that generate half-wave fault currents. The 10 kA breaking capacity at 230/400 V means it safely clears a bolted fault up to 10 kA without welding the contacts; this is the standard SCCR for residential and light-commercial distribution boards in IEC markets. The C-curve (10× to 20× In magnetic trip) avoids nuisance tripping on motor and capacitive loads while still protecting the 2.5 mm² final circuit.
Sourcing and availability
The 5SU1654-7KV10 is a standard catalogue item from Siemens, stocked broadly across European distribution. For current pricing and availability, submit an RFQ — we confirm lead time and per-unit pricing at quote time through our multi-source supply chain. No minimum order quantity restrictions apply to this line.