Four poles (4P) in a 72 mm wide housing that snaps onto DIN rail — 4 modular width units. Breaking capacity is 10 kA per EN 60898 and 20 kA per IEC 60947-2, which means it clears faults up to 20 kA under the industrial standard, giving headroom for high-fault panels. Designed for railway applications per the product designation, so it carries vibration and temperature cycling tolerance beyond a standard commercial MCB.
The 25 A rating holds at 35 °C ambient; at 40 °C it derates to 24 A, at 50 °C to 22.98 A, and at 60 °C to 21.9 A.
Construction and compliance
Halogen-free and silicon-free construction, sealable, with touch protection on the terminals. Energy limitation class 3 — the arc energy let-through is low enough to protect downstream equipment in a fault. The fastening method uses a quick assembly system (snap-on DIN rail). The product carries the SENTRON brand and is classified per IEC 81346-2 and DIN EN 61346-2 as function F (protection).