63 A MCCB with shunt trip — line protection for distribution panels
The Siemens SENTRON 3VA2063-5HL36-0HC0 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. Breaking capacity reaches 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3 kA at 690 V, so it handles high-fault utility feeds and transformer secondaries without cascading upstream. The built-in shunt trip (STL) and two HQ auxiliary switches give remote trip and status feedback for automated or safety-monitored circuits.
Fit and panel integration
At 105 mm wide × 181 mm tall × 86 mm deep, this MCCB fits standard SENTRON mounting footprints and leaves room for adjacent breakers and accessories on the DIN rail or panel-mount plate. The 63 A frame keeps power loss at 5.4 W maximum, so thermal rise inside a sealed enclosure stays manageable without forced ventilation.