63 A motor-protection MCCB with flat thermal derating
The Siemens 3VA2163-5MN32-0DA0 is a SENTRON molded case circuit breaker (MCCB) designed specifically for motor protection — it carries a 63 A continuous rating and holds that full 63 A from 40 °C all the way up to 70 °C ambient, so no derating gymnastics in a warm panel. Three-pole construction with built-in phase failure detection and an undervoltage release (UVR) as the auxiliary release — that UVR is the coil that drops the breaker if control voltage disappears, standard for motor starter coordination.
SCCR headroom across voltage levels
Short-circuit current rating (SCCR) is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — that steep drop at 690 V is the arc-extinction limit in this frame size, so verify your fault current at the line voltage before specifying.
Panel fit and dimensions
Footprint is 105 mm wide by 181 mm tall by 86 mm deep — standard 3-pole MCCB envelope for a 63 A frame. Mounts on a DIN rail or direct panel; the UVR adds a few mm behind the breaker face, so account for wiring space at the bottom of the enclosure.