The Siemens 3VA1340-4EF42-0AA0-ZD00 is an IEC frame 400 molded-case circuit breaker rated for line protection with a TM240 thermal-magnetic trip unit. Its 36 kA breaking capacity at 415 V (class S) means it can safely interrupt fault currents up to that level on a 400 V distribution bus, providing selectivity headroom for downstream branch breakers. The overload protection is adjustable from 280 A to 400 A, and the short-circuit pickup is set at 5 to 10 times In — settings that let the panel builder coordinate with upstream and downstream devices during a selective coordination study.
Deployment Context
The included nut keeper kit simplifies mounting in OEM enclosures, particularly for DC Power OEM builds in China where panel space and fastening reliability are priorities.