The Siemens SENTRON 3VA2163-5MN32-0HC0 is a 3-pole molded case circuit breaker (MCCB) designed specifically for motor protection, rated at 63 A continuously from 40 °C up to 70 °C without derating — meaning it holds its full current rating across the typical panel ambient range, so you don't have to oversize for a hot enclosure.
Breaking capacity and selectivity
At 415 V it interrupts 121 kA, and at 240 V it handles 187 kA — figures that put it comfortably in the high-fault category for industrial distribution. At 690 V the rating drops to 3.7 kA, so if you're on a 690 V line, this breaker is for downstream motor protection only, not the main feeder. The 121 kA at 415 V gives enough SCCR headroom for most secondary substations and large motor control centers; you can coordinate downstream without worrying about the breaker becoming the weak link.
Motor protection features
This MCCB includes phase failure detection and a shunt trip (STL) release, plus two auxiliary switches HQ for remote status feedback — all factory-integrated, so you don't add separate modules on the DIN rail. It is designed as a motor protection device, meaning the trip curve and thermal memory are tuned for motor starting inrush and overload profiles, not just cable protection.
Dimensions and panel fit
At 105 mm wide, 181 mm tall, and 86 mm deep, it fits standard MCCB panel cutouts. The 86 mm depth is shallow enough for most 200 mm deep enclosures, leaving room for wiring and busbar clearance behind the breaker.