Siemens 5SL6325-7MB SENTRON MCB — 3-pole, C-curve, 25 A, 6 kA
The Siemens 5SL6325-7MB is a 3-pole miniature circuit breaker from the SENTRON family, rated 25 A with a C-curve trip characteristic. It breaks fault currents up to 6 kA per EN 60898 at 400 V AC — the standard interrupting rating for residential and light commercial distribution boards in 50/60 Hz networks. The C-curve means it trips between 5× and 10× rated current, so it handles moderate inrush from motorized loads like pumps or compressors without nuisance tripping, while still clearing short-circuit faults fast enough to protect downstream wiring.
Panel fit and integration
The 5SL6325-7MB occupies 3 modular width units (54 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm. It mounts in any position, accepts supplementary devices (auxiliary contacts, shunt trips, alarm switches), and is sealable — useful for panel builders who need to lock settings after commissioning. The IP20 rating applies only with connected conductors, so the busbar area stays live; standard for distribution board use.