63 A MCCB with ETU310M — starter protection duty
The ETU310M electronic overcurrent release gives you adjustable thermal and magnetic pickup bands, so you can fine-tune it to the motor's locked-rotor curve instead of relying on a fixed bimetal. Interrupting capacity runs 330 kA at 240 V AC, 242 kA at 415 V, and 187 kA at 500 V — drops to 3.7 kA at 690 V, which is still enough for most 690 V motor branch circuits.
Panel fit — DIN footprint and thermal derating
Maximum power loss is 4 W, which keeps panel heat rise minimal even in a dense enclosure.