Breaking capacity hits 10 kA Icu at 440 V AC (IEC 60947-2), which is the number to match against your transformer secondary or main feeder fault current. At 380–400 V it climbs to 18 kA Icu; at 240 V it's 25 kA. On the DC side it manages 5 kA at 125 V DC (1-pole) and 250 V DC (2-pole). That's enough for most 480 V branch circuits and many 240 V industrial panels.
Fixed backplate mount, front connections top and bottom, 25 mm connection pitch. Dimensions: 100 mm wide, 130 mm high, 60 mm deep. IP20 finger-safe front, IK07 impact rating on the enclosure. Pollution degree 3 per IEC 60947 — handles conductive dust environments common in light industrial or warehouse panels.
Protection and duty
Three protected poles, one unprotected neutral pole (the 4th pole is a switched neutral with no overload protection). Thermal-magnetic TM-D trip covers short-circuit and overload — no earth-leakage module fitted. Category A utilization means it's not intended for frequent switching under load; it's a distribution breaker, not a motor-starter disconnect. Mechanical durability is 13,000 cycles — typical for a distribution MCCB. If you need daily switching, spec a contactor upstream.
That covers unheated electrical rooms and outdoor enclosures in most climates.