It is rated 75 A at 40 °C and carries a 10 kA Icu breaking capacity at 440 V AC 50/60 Hz per IEC 60947-2. The 75 A rating at 50 °C tells you the trip unit holds its calibration at elevated panel temperatures — useful when this breaker sits in a crowded enclosure where ambient heat builds.
The EZC100N4075 delivers 25 kA Icu at 220...240 V AC and 18 kA Icu at 380...400 V AC, dropping to 10 kA at 440 V AC and 5 kA at 550 V AC. On the DC side, it manages 5 kA Icu at 125 V DC (1P) and 5 kA at 250 V DC (2P). The N breaking capacity code positions it for general distribution duty — not the high-fault industrial mains, but adequate for most sub-distribution boards where the transformer rating keeps fault current under 10 kA at 440 V. The 5 kA at 550 V AC is a useful headroom figure for 480 V systems where the nominal voltage sits below the 550 V ceiling.
Fixed mounting on a backplate with front connections top and bottom. The 100 mm width and 60 mm depth fit standard distribution board cutouts; the 25 mm connection pitch matches common busbar and lug spacing. IK07 impact rating handles incidental tool strikes during installation. Pollution degree 3 per IEC 60947 confirms it tolerates conductive dust in industrial enclosures — no special sealing required for most factory-floor panels.
The EZC100N4075 is certified to JIS C8201-2-2, EN/IEC 60947-1, EN/IEC 60947-2, and GB/T 14048.2. The 690 V AC rated insulation voltage and 550 V AC / 250 V DC operational voltage cover standard three-phase systems up to 480/277 V and DC bus applications. The -25 to 70 °C operating range and -35 to 85 °C storage range suit unheated electrical rooms and outdoor-rated enclosures.