The Siemens SENTRON 3VA2340-5HL32-0KC0 is a 3-pole molded case circuit breaker rated for 400 A continuous at 40 °C, with a maximum interrupting capacity of 187 kA at 240 V. That interrupting rating drops to 121 kA at 415 V and 7.5 kA at 690 V — so the voltage you're clearing at determines the fault current this breaker can safely interrupt. It's configured for line protection and ships with a shunt trip release (STL) and two auxiliary switches HQ.
Thermal derating and continuous current
The breaker holds 400 A from 40 °C up to 50 °C, then derates linearly: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. If your panel ambient runs above 50 °C, that 400 A nameplate isn't what you'll get — size the upstream feeder accordingly.
Dimensions and panel fit
The breaker measures 110 mm deep, 138 mm wide, and 248 mm high. That footprint matches the SENTRON 3VA fixed-format frame — if you're swapping from an earlier 3VA variant, check the depth clearance first; the 110 mm depth is standard for this frame size.