The Siemens SENTRON 3VA2163-6HN32-0HH0 is a 3-pole molded case circuit breaker (MCCB) 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's designed for line protection in distribution panels, with a 242 kA interrupting capacity at 240 V that drops to 187 kA at 415/440 V and 121 kA at 500 V; at 690 V it still clears 3.7 kA. For a 63 A frame, those numbers mean it handles high-fault scenarios common in industrial mains without needing an upstream current-limiting fuse.
What's inside the can
Factory-fitted with a shunt trip (STL) for remote tripping and a 2-auxiliary-switch-plus-1-trip-alarm-switch HQ configuration. That means you get two form-C auxiliary contacts for status feedback and a dedicated alarm contact that changes state only on a trip event — useful for annunciation without extra wiring. No undervoltage release, no ground-fault monitoring, no communication module on this variant. The basic switch is 3VA2163-6HN32-0AA0; this order code adds the accessories at the factory.
Panel fit and environment
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard MCCB footprint that drops into most SENTRON mounting plates and DIN-rail adapters. Operating range is -25 °C to 70 °C ambient; storage from -40 °C to 80 °C. Power dissipation is 4 W maximum at rated load, so heat buildup in a dense panel is minimal. The 3VA2 frame is the compact version of the SENTRON line — saves panel space compared to the 3VA1 frame for the same 63 A rating.