63 A MCCB for Motor Protection — SENTRON 3VA2 Frame
The Siemens 3VA2163-7MN36-0CL0 is a SENTRON molded case circuit breaker (MCCB) in a 3-pole configuration, designed specifically for motor protection. It carries a full 63 A continuous rating across the entire ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel sizing in warm enclosures. The interrupting capacity hits 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, and 187 kA at 500 V; at 690 V it still holds 3.7 kA, covering most industrial supply voltages. This MCCB includes an undervoltage release (UVR) and a full complement of auxiliary switches: 2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ. The phase-failure detection and trip indicator are built in, so it handles the typical motor-protection coordination without an external relay. The basic switch variant is 3VA2163-7MN36-0AA0.
Panel Fit and Mounting
Dimensions are 86 mm deep, 105 mm wide, and 181 mm high — a standard 3-pole MCCB footprint for the SENTRON 3VA2 frame. It mounts on a DIN rail or directly to a backplate; the 105 mm width matches typical 3-pole MCCB spacing in distribution panels. The undervoltage release coil and auxiliary wiring terminals are accessible from the front, so panel wiring and troubleshooting don't require pulling the breaker.