Line protection MCCB with ETU550 and comms
Breaking capacity across voltages — what the numbers mean
This MCCB delivers 242 kA at 240 V, 187 kA at both 415 V and 440 V, 121 kA at 500 V, and 6 kA at 690 V. For 400 V class panels (common in European industrial mains), the 187 kA rating covers virtually any installation without an upstream current-limiting fuse.
Temperature derating — the real current you can carry
At 55 °C it derates to 238 A, at 60 °C to 225 A, at 65 °C to 213 A, and at 70 °C to 200 A.
Auxiliary contacts and releases
The undervoltage release is not present on this variant. The basic switch assembly carries order code 3VA2225-6JP32-0AA0; the integrated auxiliary trip is 3VA9688-0BL33.
Physical fit — panel cutout and mounting
This is a standard 3-pole SENTRON 3VA2 frame size — mounts via four screws to a backplate or DIN-rail adapter. Power loss is 48 W maximum at rated current, so factor that into the enclosure thermal budget.