What this MCCB delivers on the line
The Siemens SENTRON 3VA2340-5JP32-0CL0 is a 3-pole molded case circuit breaker rated for 400 A continuous current at 40 °C through 50 °C, with the same 400 A rating holding across that band — no derating needed until you cross 55 °C, where it steps down to 375 A, then 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. That thermal curve means you can run it at full nameplate in most ventilated enclosures without a second look. Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V. For a 400 A frame, that 187 kA at 240 V gives you serious SCCR headroom on low-voltage distribution — useful when you're feeding a conveyor zone with multiple motor starters downstream and need to coordinate selectively without cascading upstream. It includes an undervoltage release (UVR) and a communication function, plus a configurable auxiliary switch block: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch HQ. The trip indicator is present, so a quick visual scan tells you whether it's tripped or healthy — saves time on a panel walk during a jam recovery.
Panel fit and integration
Dimensions are 248 mm high, 138 mm wide, and 110 mm deep. Designed for line protection, this breaker handles feeder and main distribution duty. The communication function lets it talk to a higher-level control system — useful for remote monitoring of trip events and load status on a zoned conveyor line where you want to know which section dropped without walking the whole length. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Maximum power loss is 98.5 W — factor that into your enclosure thermal budget if you're packing multiple breakers in a tight panel.
How it compares to the 3VA2225-5HN42-0BB0
The 3VA2225-5HN42-0BB0 is a 250 A frame — 150 A lower continuous rating than this 400 A unit. Both are 3-pole SENTRON MCCBs with similar breaking capacities at the lower voltage tiers, but the 3VA2225 frame is physically smaller (shorter and narrower). If your panel was laid out for the 3VA2225, the 3VA2340 will not drop into the same mounting footprint without bus bar and enclosure modifications. Stick with the 3VA2225 for a direct swap; use the 3VA2340 only if you're upsizing the feeder.