What this MCCB delivers
The Siemens SENTRON 3VA2340-5HL32-0BK0 is a 3-pole molded case circuit breaker rated for 400 A continuous current at 40 °C, with a maximum breaking capacity of 187 kA at 240 V AC — enough to handle high-fault utility feeds or large transformer secondaries without cascading upstream. It carries a line protection design (no communication function, no ground-fault monitoring), making it a straightforward main or feeder breaker for distribution panels where remote monitoring isn't required.
Ratings that matter for fit
Continuous current holds at 400 A from 40 °C up to 50 °C, then derates to 385 A at 55 °C and 340 A at 70 °C — so in a warm enclosure you still get full rating up to 50 °C ambient. Breaking capacity steps down with system voltage: 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V — verify your available fault current at the point of installation. The auxiliary switch configuration includes 1 auxiliary switch, 1 trip alarm switch, and 1 electrical alarm switch (HQ type), plus an undervoltage release — enough for remote status indication and UVR-based trip on loss of control power.
Mounting and panel fit
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — a standard SENTRON 3VA footprint that drops into existing MCCB mounting bases and busbar systems without panel rework. Maximum power loss is 98.5 W, so plan for ventilation or derating if the breaker is enclosed in a small, sealed sub-panel.