63 A MCCB built for motor-starting duty
Siemens SENTRON 3VA2163-7MS36-0JH0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at ambient temperatures from 40 °C up to 70 °C — no derating needed across that whole span, which is unusual for an MCCB this size. It's designed specifically for starter protection, meaning it's tuned to handle the inrush and locked-rotor current of motor loads without nuisance tripping, while still clearing hard faults. The interrupting ratings are what make this thing serious: 330 kA at 240 V, 242 kA at 415 V, and 242 kA at 440 V — that's enough to handle most transformer-fed or generator-backed fault currents in industrial distribution. Up at 690 V it still holds 3.7 kA, which is respectable for a 63 A frame.
What the ratings mean for your panel
The 63 A rating with full thermal performance to 70 °C (–) means you can pack this breaker into a warm enclosure — say, a motor control center or a panel near a furnace — without having to oversize the frame. The 105 mm width and 86 mm depth fit standard SENTRON 3VA panel footprints; it's a direct bolt-on for the 3VA2163 base switch. Power loss is only 4 W, so heat buildup in a dense panel stays manageable. The auxiliary switch configuration — 2 auxiliary switches plus 1 trip alarm switch HQ — gives you status feedback for a PLC or annunciator without needing an add-on module. And the shunt trip release lets you remote-trip it from an emergency stop or safety relay.