What this MCCB carries and where it fits
The 3VA2340-5JQ32-0JH0: Interrupting capacity runs from 187 kA at 240 V down to 121 kA at 415/440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V — so the 240 V figure is the headline, but at typical 400 V distribution the 121 kA still gives substantial fault-current headroom for most industrial service-entrance or feeder applications. The breaker ships with a shunt trip (STL) auxiliary release and a 2-auxiliary-switch + 1 trip alarm switch HQ configuration, plus an undervoltage release is not fitted (no on the spec). The communication function is present, which on the 3VA2 platform typically means a COM module slot for PROFIBUS, PROFINET, or Modbus TCP — useful for remote monitoring and selective coordination schemes.
Thermal derating and panel fit
The 400 A rating holds flat from 40 °C through 50 °C, then derates to 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. If the panel ambient runs above 50 °C, the continuous current must be adjusted accordingly — a common oversight when stuffing a dense MCCB lineup into a sealed enclosure. Dimensions are 248 mm high, 138 mm wide, 110 mm deep (9.76 in, 5.43 in, 4.33 in). Maximum power loss is 96 W at rated current, which factors into the enclosure's thermal budget — not trivial in a sealed stainless steel panel on a food line.