Siemens 5SJ6425-6RC MCB, 4p 6kA 25A B Characteristic

The Siemens 5SJ6425-6RC is a 4-pole miniature circuit breaker (MCB) from the Retail line, rated 25 A with a B tripping characteristic and a 6 kA breaking capacity. The B characteristic means it trips between 3 and 5 times rated current — suited for resistive or general-purpose loads where inrush is moderate, such as lighting circuits or small control transformers. The 6 kA breaking capacity at 400 V AC is the standard fault-interruption rating for final subcircuits in most European distribution boards; it safely clears a short-circuit fault up to that level without upstream devices needing to intervene.