Breaking capacity is 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V, dropping to 17 kA at 500 V and 690 V — the high interrupt ratings at lower voltages make this breaker suitable for high-fault-capacity service entrances or industrial sub-distribution where fault currents can exceed 100 kA.
Current Derating and Thermal Performance
At 55 °C it derates to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A — a 7.5 % loss from the nameplate at the top of the operating range. Maximum power dissipation is 10.8 W, which matters for thermal coordination inside a sealed enclosure.
Panel Fit and Auxiliary Switching
Dimensions are 76.2 mm wide (3 in), 130 mm high (5.12 in), and 70 mm deep (2.76 in) — a standard 3-pole MCCB footprint that drops into most SENTRON panelboards and distribution blocks without re-drilling. The breaker ships with two factory-installed auxiliary switches (HQ type), providing status feedback for remote monitoring or PLC inputs.