What this MCCB carries and where it lands
The Siemens 3VA2340-5HL32-0JL0 is a SENTRON molded case circuit breaker (MCCB) rated for 400 A continuous current at 40 °C, with a 3-pole configuration and a maximum interrupting capacity of 187 kA at 240 V. It's designed for line protection — meaning it sits at the feeder or main breaker position in a distribution panel, protecting downstream circuits against short circuits and overloads. The 400 A frame gives you headroom for a 400 A bus or a large motor control center feed, and the 187 kA at 240 V tells you it can handle a high-fault utility service without needing a current-limiting fuse upstream. The interrupting ratings drop predictably as voltage rises: 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V. That 690 V figure is still respectable for a 400 A frame — it clears a 7.5 kA fault at that voltage without welding contacts. The 3VA2 platform uses a rotary contact design that limits let-through energy, which helps with downstream device coordination.
Thermal performance and auxiliary fit
The breaker holds its full 400 A rating from 40 °C up to 50 °C ambient, then derates linearly to 340 A at 70 °C. That means in a hot panel — say near a furnace line or in a non-climate-controlled enclosure — you still get 340 A continuous without nuisance tripping. The operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. This variant ships with a shunt trip release (STL) for remote tripping, plus a full auxiliary switch complement: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch HQ. That's enough for remote status feedback to a PLC or SCADA — you get breaker open/closed, trip event, and a separate alarm contact for the shunt trip activation. The basic switch is a 3VA2340-5HL32-0AA0, so the auxiliary and release modules are factory-integrated, not field-added. Max power loss is 96 W at rated current — useful for enclosure heat load calculations. The breaker is 248 mm tall, 138 mm wide, and 110 mm deep, so it fits standard 3-pole MCCB panel cutouts in the SENTRON family. No undervoltage release, no ground-fault monitoring, no communication function on this order code — it's a pure line-protection breaker with shunt trip capability.