What this MCCB carries in the carton
The Siemens SENTRON 3VA2040-5JQ46-0AA0 is a 4-pole molded case circuit breaker rated for 40 A continuous current, with a full-scale setting of 40 A and an adjustable thermal-magnetic trip range from 60 A minimum to 480 A maximum. Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V — so it clears high-fault currents on industrial distribution without cascading upstream. The 86 mm depth, 140 mm width, and 181 mm height fit standard panel mounting; no special brackets needed. Power loss is 2.2 W maximum, which keeps heat manageable in a crowded enclosure.
Line protection with ground-fault monitoring built in
This MCCB is designed for line protection and includes a ground-fault monitoring version using summation current formation of L + N conductors. That means it detects leakage on the outgoing circuit without a separate GFCI module — one less component to wire and test. Communication function is on board, so it can report status to a higher-level system over the SENTRON bus.