What it is and what it does
The Siemens SENTRON 3VA2163-5KP32-0JH0 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 is designed for line protection in distribution panels and motor control centers, with a maximum interrupting capacity of 187 kA at 240 V AC and 121 kA at 415 V and 440 V. The high SCCR at 240 V makes it a fit for fault-current-heavy industrial services where a standard MCCB would cascade upstream.
Key ratings and what they mean for your panel
The 63 A frame holds its rating flat through 70 °C — no thermal derating curve to calculate. That simplifies panel design in warm enclosures or near heat-generating equipment. The interrupting ratings drop with voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. At 690 V the breaker is still usable but the fault-current capability is low; verify the available fault current at that voltage before specifying. The breaker includes a trip indicator, a voltage trigger, and a communication function — the latter allows remote monitoring or integration into a higher-level energy management system. The auxiliary switch block carries 2 auxiliary switches plus 1 trip alarm switch (HQ designation), and a shunt trip (STL) is built in. There is no undervoltage release and no ground-fault monitoring module on this variant.
Mounting and integration
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard MCCB footprint for 3-pole 63 A frames. It mounts directly onto a DIN rail or panel-mount adapter in the enclosure. The shunt trip and auxiliary switches are wired via the factory-supplied terminals; no additional wiring accessories are required for basic line protection.