Siemens 5SL3325-6 SENTRON MCB – 3-Pole B-Curve 25 A
It breaks fault currents up to 4.5 kA per EN 60898 and IEC 60947-2 at 400 V AC, which covers the typical SCCR requirement for residential and light commercial distribution boards.
The 400 V AC rated voltage and 440 V maximum multi-phase voltage (phase-to-phase) suit standard 230/400 V three-phase networks. The mechanical service life of 10 000 switching cycles is standard for this class — adequate for routine isolation and fault clearing, not for frequent switching duty.
Physical Integration
The breaker measures 90 mm high, 54 mm wide (3 MW), and 76 mm deep, with an installation depth of 70 mm. Sealable terminals allow lockout/tagout for maintenance isolation. Halogen-free and silicon-free construction avoids corrosive off-gassing in confined enclosures.