What this 3VA1 MCCB carries
The Siemens 3VA1340-5EF32-0CA0 is a 3-pole IEC frame 400 molded-case circuit breaker with class M breaking capacity — 55 kA at 415 V AC. It ships with a TM240 thermal-magnetic trip unit rated 400 A (In). That adjustability lets a panel builder dial in the protection for a specific motor or transformer load without swapping trip units. Factory-fitted is an undervoltage release rated 120–127 V AC, 50/60 Hz. If the control voltage drops, the release trips the breaker open — standard practice for safety circuits or machinery where loss of control power should kill the main feed.
The TM240 trip unit and undervoltage release are factory-installed — no field wiring of the release coil beyond the control voltage connection. Verify the release coil's AC supply (120–127 V) matches the panel control transformer tap before landing wires.