MCCB for line protection — 40 A, 3-pole, with undervoltage release
This MCCB carries a 187 kA interrupting rating at 240 VAC — that is its highest published breaking capacity, typical for a high-interrupting 3VA1 frame at low voltage. At 415 VAC it is rated 121 kA; at 440 VAC, 75.6 kA; at 500 V and 690 VAC, 17 kA.
Thermal-magnetic trip — TM240, no communication, no ground-fault
That means the thermal element handles overloads (inverse time) and the magnetic element handles short circuits (instantaneous). The power loss is 13.3 W maximum, which matters for thermal management inside a sealed enclosure. Ambient temperature derating starts above 55 °C: at 55 °C the rating drops to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A. Below 55 °C the breaker is rated a full 40 A.
It is a 3-pole MCCB designed for DIN-rail or direct-panel mounting in a distribution board or motor control center. The 76.2 mm width (3 inches) is standard for a 3-pole SENTRON 3VA1 frame, so it occupies a predictable footprint in a multi-breaker lineup. No auxiliary contacts or shunt trip are included on this order code — only the undervoltage release.