The Schneider Electric EZC400H3400 is a 3-pole molded case circuit breaker from the EasyPact EZC400H series, rated 400 A at 50 °C (trip unit TM-D). The thermal-magnetic trip unit provides both overload protection (thermal curve) and short-circuit protection (magnetic instantaneous trip set at 3500 A). Breaking capacity is 50 kA Icu at 380 V AC, 400-415 V AC, and 440 V AC per IEC 60947-2. At 220-240 V AC the Icu rises to 70 kA. Electrical durability is 4000 cycles at 415 V AC, mechanical durability 10,000 cycles. Mounts fixed to a backplate (not DIN rail) with front connections both top and bottom. IP20 finger-safe protection on the front; IK07 impact rating means it withstands a 2 J hammer blow — fine for general industrial enclosures. Pollution degree 3 per IEC 60947, so it's rated for conductive environments (condensation, light dust).
Physical footprint: 255 mm high, 185 mm wide, 140 mm deep. Connection pitch (pole spacing) is 44 mm. The breaker uses a toggle handle for manual control and provides positive contact indication — the handle position mechanically reflects the contact state, not a separate flag. No earth-leakage protection module is integrated; neutral protection is not provided (3-pole, no neutral pole). If ground-fault or neutral protection is required, an external add-on must be wired downstream. Standards compliance includes IEC 60947-2, EN 60947-2, JIS C8201-2-2, and GB/T 14048.2. No UL or CSA listing is stated in the record.