The Siemens SENTRON 3VA1332-6EF42-0CA0 is a 4-pole molded case circuit breaker (MCCB) rated 320 A at 40 °C, with a TM240 thermal-magnetic overcurrent release and an integrated undervoltage release (UVR).
The TM240 release means the thermal pickup is fixed at 320 A; magnetic trip is adjustable within the TM240 range. If you're used to the 3VA1112-5EE32-0AA0 (a 3-pole 320 A frame with lower breaking capacity), this 4-pole variant with the UVR is the part you reach for when you need both neutral protection and undervoltage lockout on the same frame.
