The EZC250N4250 is a 4-pole molded case circuit breaker from the EasyPact EZC250N series, rated 250 A at 40 °C ambient and carrying a TM-D thermal-magnetic trip unit. The 250 A trip rating at 50 °C means the breaker holds its full load rating even in a warm panel — no derate needed until you push past 50 °C. The 20 kA Icu at 440 V AC (IEC 60947-2) tells you it can safely interrupt a fault current up to that level without welding or exploding; at 380–415 V AC that figure rises to 25 kA, and at 220–240 V AC it hits 50 kA. For DC circuits, it's rated 20 kA at 125 V DC (1-pole) or 250 V DC (2-pole). The N breaking capacity code places it in the standard-interrupting range for this frame size — adequate for most distribution panels, not for high-fault industrial mains. The 4-pole configuration with 3 protected poles (no neutral protection) suits 3-phase + N distribution where the neutral is solidly bonded. The toggle control and front connections (both line and load) mean it panels in with busbars or cable lugs on the same face — no rear-access required. Mounting is fixed backplate, not DIN rail; the 140 mm width and 165 mm height fit standard MCCB cutouts. Pollution degree 3 (IEC 60947) means it's rated for conductive environments, typical of industrial panels.
The breaker carries approvals to EN/IEC 60947-1, EN/IEC 60947-2, JIS C8201-2-2, and GB/T 14048.2. The IP20 finger-safe protection and IK07 impact resistance cover panel-side handling. No earth-leakage protection is integrated; that's handled separately if needed. The 10,000-cycle mechanical durability is standard for a distribution MCCB — not a high-cycle motor-switching device.