Its TM240 thermal-magnetic overcurrent release handles both overload and short-circuit conditions without an external trip unit. The interrupting capacity scales with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — so the same breaker can be specified across multiple distribution voltage levels as long as the available fault current stays under the applicable rating.
Thermal derating and ambient temperature profile
Above that, the breaker derates linearly: 120 A at 55 °C, 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C.
Integrated undervoltage release and auxiliary contact block
When line voltage drops below the release threshold, the breaker trips, which is standard for applications requiring under-voltage protection on motor feeders or safety circuits. A mechanical trip indicator is also present on the front.
Width is 76.2 mm (roughly 3 inches), depth is 70 mm, height is 130 mm.