The Siemens 3VA2163-5KP32-0HC0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 63 A and a maximum breaking capacity of 187 kA at 240 VAC — enough to handle high-fault utility feeds or transformer secondaries without cascading upstream.
Breaking capacity by voltage level
The interrupting rating drops with system voltage: 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. At 690 V it's essentially a distribution-only rating — not for motor-starting duty at that voltage. The 187 kA at 240 V is the headline figure that tells you this breaker can sit on a high-capacity transformer secondary without needing a current-limiting fuse upstream.
Thermal performance across ambient range
Rated current holds at 63 A from 40 °C all the way up to 70 °C — no derating curve to calculate for standard panel ambient. Operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The 4 W maximum power loss is manageable for enclosure heat budgets.
Integrated communication and auxiliary options
This breaker includes a communication function for integration into networked power monitoring schemes. It ships with a shunt trip release (STL) and two HQ auxiliary switches — enough for remote trip indication and status feedback without adding external modules. No undervoltage release or ground-fault monitoring on this variant.
Dimensions and panel fit
Footprint is 105 mm wide by 181 mm tall by 86 mm deep — a standard SENTRON 3VA2 frame size. Three-pole construction, so it occupies one full pole position in a distribution panel. No trip indicator on the front face; trip status comes through the auxiliary switches.