What it is and what it does
The Siemens SENTRON 3VA2163-5MN32-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 63 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. It is specifically designed for motor protection, with integrated phase failure detection and a shunt trip release (STL) for remote tripping. The interrupting capacity hits 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V, so it handles high-fault utility feeds and downstream coordination in industrial panels. The auxiliary switch block carries 2 auxiliary switches plus 1 trip alarm switch (HQ), giving feedback for PLC status monitoring or remote annunciation. Power loss is a modest 4 W maximum, so heat buildup inside a crowded enclosure stays manageable.
Panel fit and integration
The 3VA2163-5MN32-0HH0 measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON-compatible mounting plates or DIN-rail adapters. The basic switch variant is 3VA21635MN320AA0, so if you are replacing a unit in an existing panel, verify the base switch matches the installed wiring pattern. The shunt trip (STL) and auxiliary switch block (2 aux + 1 trip alarm) are factory-fitted, saving field-installation labor.