The EZC400H3300 is a 3-pole molded case circuit breaker from the EasyPact EZC400H range, rated 400 A at 40 °C ambient. The TM-D thermal-magnetic trip unit handles overload protection (thermal element, inverse-time curve) and short-circuit protection (magnetic element, instantaneous). For distribution duty (Category A, no intentional short-time delay), this is the standard fit for main or feeder breakers in a panel. At 220-240 V AC, it rises to 70 kA Icu. The 'H' suffix in the code designates this high-breaking-capacity variant.
Fixed mounting on a backplate — no DIN rail adapter here. The 185 mm width, 255 mm height, and 140 mm depth define the envelope for panel layout. The 44 mm connection pitch matches standard bus-bar spacing for 3-pole breakers in this class. IP20 finger protection on the front, IK07 impact resistance. The toggle handle gives positive contact indication — you can see and feel the position.