Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V.
Sizing and selectivity
This MCCB is sized for a 400 A feeder or main. The 5 kA limited-to-1-second rating matters for short-time withstand during coordination studies — downstream breakers must clear faster than that to keep the main from tripping on a through-fault. The undervoltage release (UVR) built into this variant drops the breaker if control voltage falls below the dropout threshold; wire it to an E-stop or safety relay for loss-of-voltage protection. Panel space: 138 mm wide, 248 mm tall, 110 mm deep — standard SENTRON 3VA footprint, fits existing busbar and DIN-rail layouts.