Siemens 5SL3125-7 SENTRON MCB — 25 A, 1-Pole, C-Curve
It breaks 4.5 kA per EN 60898 and 5 kA per IEC 60947-2, covering residential and light commercial infrastructure branch circuits.
Thermal Derating & Ambient Rating
At 40 °C it derates to 23.48 A, at 45 °C to 22.5 A, and at 55 °C to 21 A.
Physical Fit & Panel Integration
Occupies 1 modular unit (18 mm wide) on a DIN rail. Mounting position is unrestricted — horizontal, vertical, or inverted — which helps when laying out a dense sub-distribution board.
Halogen-free and silicon-free construction. Sealable terminals for tamper-proofing after commissioning. Mechanical service life rated at 10 000 switching cycles typical. Rated for both AC (400/440 V multi-phase, 250 V single-phase) and DC operation up to 72 V. DC rating is useful for control-circuit protection in the same panel.