Allen-Bradley 140G-H6F3-C80 H Frame Circuit Breaker

The Allen-Bradley 140G-H6F3-C80 is a 3‑pole, H‑frame molded‑case circuit breaker rated for 80 A in industrial power distribution. It features a thermal‑magnetic (T/M) trip mechanism and a 65 kA interrupt rating at 480 V AC, making it suitable for fast short‑circuit isolation while protecting downstream devices. The 140G family uses a 125 A frame size with a compact footprint (about 90 mm wide and 82.5 mm deep) to fit standard MCCB enclosures and bus bar assemblies. Key electrical characteristics include an insulation voltage (Ui) of 1000 V, a rated impulse withstand voltage (Uimp) of 8 kV, and a maximum reverse‑fed voltage of 480 V AC per UL/CSA, enabling reliable operation in mixed supply topologies. The device provides 80 A of continuous current (Iu) with a thermal trip range around 56–80 A and a magnetic trip range around 400–800 A, delivering predictable protection for fault currents above the thermal setting. Expected life cycle is roughly 8,000 operating cycles at 415 V AC, with an operating ambient temperature of up to 40°C (104°F) without derating. This model is designed for use in control panels and distribution circuits where a compact, UL/CSA‑recognized, three‑phase protection device is needed, combining precise overload protection with solid short‑circuit interrupt capability while maintaining straightforward, toggle‑operated operation.