The Siemens 5SV3445-6KK01 is a 4-pole residual current operated circuit breaker (RCCB) from the RCCBs family, rated at 125 A with a 100 mA trip sensitivity and 400 V AC supply voltage, short-time delayed. Type A detection means it responds to sinusoidal AC fault currents as well as pulsating DC fault currents — the standard choice for circuits with single-phase rectified loads (e.g., switching power supplies, LED drivers, washing machines). The 100 mA sensitivity and short-time delay make this unit suitable for sub-distribution boards where selectivity with downstream 30 mA RCCBs is required, preventing a nuisance trip on a branch fault from killing the entire board.
RoHS compliance effective from June 2, 2023; REACH candidate list disclosure is available on request. Export control is AL:N / ECCN:EAR99, no special licensing required for most destinations.
Packaged as a single piece, dimensions 78 x 97 x 85 mm — standard modular width for a 4-pole RCCB, mounts on DIN rail in the distribution board alongside MCBs or other modular devices.