What the ratings mean for your panel
The 3VA2340-6KP32-0KC0 is a SENTRON molded case circuit breaker rated for 400 A continuous at 40 °C, with an adjustable thermal-magnetic trip unit covering 600 A to 4000 A — meaning you can dial in the protection curve to match the downstream load without swapping the breaker body. That trip range is what decides whether this breaker fits your feeder or main; if your calculated fault current or load current falls outside that window, this isn't the variant. Short-circuit breaking capacity runs 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V. At 415 V — common for industrial distribution in many regions — 187 kA gives you substantial headroom for high-fault panels. That 7.5 kA at 690 V is the weak point; if your system runs 690 V with available fault current above that, you need a different frame. Thermal derating is published from 40 °C through 70 °C: full 400 A holds up to 50 °C, then drops to 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. If your panel ambient runs hot — say, a non-climate-controlled enclosure next to a furnace line — you need to factor that derating into the continuous load calculation. The 96 W maximum power loss also matters for enclosure thermal management.
Integration and accessories
This is a 3-pole breaker in a frame sized 248 mm high, 138 mm wide, 110 mm deep — standard SENTRON 3VA2 form factor for panel mounting. It ships with a shunt trip (STL) for remote tripping and two HQ auxiliary switches for status feedback to a PLC or indication lamp. The basic switch variant underneath is 3VA2340-6KP32-0AA0; the -0KC0 suffix adds the communication function, so you get a breaker that can talk to a higher-level system for monitoring or remote operation. Line protection design means the internal trip characteristics are shaped for feeder and main applications, not motor protection.