The Siemens SENTRON 3VA2163-7MN32-0HA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It is designed specifically for motor protection, with integrated phase failure detection and a shunt trip release (STL) for remote emergency-off or undervoltage control. Breaking capacity is the headline here: 330 kA at 240 V, 242 kA at 415/440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That 330 kA at 240 V is a high-interrupting rating for a 63 A frame — it handles fault currents on the secondary side of a large transformer or a high-capacity bus without cascading upstream breakers.
Sizing and trip characteristics
The thermal-magnetic trip operates with a minimum delay of 4 s and a maximum of 17 s under fault conditions, which gives selectivity headroom against downstream branch breakers. Power loss is 4 W maximum — negligible for panel thermal budgeting, but worth noting if the enclosure is densely packed. The basic switch variant is 3VA2163-7MN32-0AA0; this -0HA0 suffix adds the shunt trip release. No auxiliary switch or ground-fault monitoring is included on this version — those are separate add-on modules.
Integration and mounting
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard 3-pole MCCB footprint that fits Siemens SENTRON mounting plates and most DIN-rail adapter kits. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C, so it handles unheated warehouses or outdoor cabinets within limits.