Line protection MCCB with communication — 400 A frame, 65 kA at 415 V
It carries a 400 A continuous rating at 40 °C and an adjustable overcurrent trip range from 600 A to 4 000 A, giving the site engineer selectivity headroom downstream.
Thermal derating and trip unit
Above that, derate linearly: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, 300 A at 70 °C. If the panel internal ambient runs hot — common in compact switchboards — the 55 °C derating to 375 A is the figure to budget against. Electronic trip unit with LSIG functions: long-time (L), short-time (S), instantaneous (I), and ground-fault (G). Initial setting at 80 A, full-scale 400 A.
Auxiliary switches and shunt trip
The auxiliary switch count is enough to report breaker position to a PLC, interlock a downstream contactor, and drive a panel lamp — all from one device. The supplied basic switch variant is 3VA2340-6JQ32-0AA0 — the base MCCB without the communication module. This -0JL0 suffix adds the communication function, so if the BOM calls for a breaker that talks to a building management system, this is the variant.