The Siemens SENTRON 3VA2440-5HN32-0KL0 is a 3-pole molded case circuit breaker (MCCB) rated for 400 A continuous at 40 °C through 70 °C, meaning no derating across the full operating temperature range — a rare flat curve that simplifies panel design.
Breaking capacity across voltages — where it fits
This MCCB delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V. The steep drop at 690 V means it is not intended for 690 V main feeders; at that voltage you are limited to 9 kA, which is fine for sub-distribution but not for high-fault service-entrance duty. The 121 kA at 415 V puts it in the high-interrupting range for a 400 A frame — suitable for switchboards and large panelboards where fault current is high.
Panel fit and auxiliary configuration
Footprint is 138 mm wide, 248 mm high, 110 mm deep — a standard 3-pole MCCB size that fits most DIN-rail or panel-mount enclosures without special adapters. The breaker ships with a shunt trip (STL) for remote tripping, plus 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ configuration), giving you four discrete signal outputs for status monitoring.