MCCB with 187 kA interrupting rating — selectivity headroom for 240 V distribution
The Siemens SENTRON 3VA2163-5HL36-0JA0 is a 3-pole molded case circuit breaker rated 63 A continuous at 40 °C, with a 187 kA breaking capacity at 240 V AC — that interrupting rating gives you headroom for high-fault panels where upstream coordination demands full selectivity down to the branch feeder. A built-in shunt trip (STL) release allows remote opening via a control signal, which is useful for emergency-stop circuits or PLC-driven load shedding.
Above that, current must be derated: 60.6 A at 55 °C, 58.3 A at 60 °C, 55.9 A at 65 °C, and 53.6 A at 70 °C. If the panel runs hot — near a drive cabinet or in a non-conditioned enclosure — factor the derating curve into your feeder sizing.
The interrupting rating drops as system voltage rises: 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V. For 480 V delta or 400 V wye industrial feeds, the 121 kA figure still covers most high-fault scenarios.
The ETU320 release is self-powered from the line current — no external control power needed for the trip function. The shunt trip coil requires a separate 24 V DC or AC signal, depending on the installed module (3VA9688-0BL32).