The Siemens SENTRON 3VA1340-6EF32-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection. It carries a continuous current of 400 A at 40 °C, with no derating needed up to 50 °C — at 55 °C it still holds 392 A, and at 70 °C it delivers 367 A. The interrupting capacity is 154 kA at 415 V AC, 220 kA at 240 V, and 121 kA at 500 V, with a 17 kA floor at 690 V. That 154 kA at 415 V means it handles high-fault scenarios common in industrial distribution without needing upstream fuses.
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — a standard MCCB footprint for a 400 A frame. The unit ships with 2 auxiliary switches plus 1 trip alarm switch (HQ design) and a shunt trip release (STL) for remote tripping. Insulation voltage rated at 800 V, so it's comfortable in 690 V systems. Maximum power dissipation is 92.1 W — factor that into enclosure thermal calculations.
Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. The breaker includes a trip indicator and voltage trigger. No undervoltage release, no ground-fault monitoring, no communication function — this is a straight line-protection MCCB with shunt trip capability.