63 A MCCB with 75.6 kA interrupting capacity — line protection for distribution panels
The Siemens SENTRON 3VA1063-3ED36-0HH0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic release for line protection. Its interrupting capacity reaches 75.6 kA at 240 V and 52.5 kA at 415 V, so it handles high-fault scenarios typical in industrial distribution without cascading upstream. The breaker includes a shunt trip (STL) auxiliary release and comes with 2 auxiliary switches plus 1 trip alarm switch HQ. Front face is IP40 rated, suitable for panel-mount enclosures.
Current derating and thermal limits
The 63 A rating holds steady up to 50 °C ambient; at 55 °C it derates to 60.48 A, and at 70 °C to 56.7 A. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. For panels running hot — say, a packed enclosure near a furnace line — the derating curve matters for continuous load planning.
Integration notes — panel fit and auxiliary wiring
Dimensions are 76.2 mm wide, 130 mm high, 70 mm deep — standard 3-pole MCCB footprint for DIN-rail or screw-mount panels. The shunt trip (STL) is factory-fitted; verify polarity on the trip coil before energizing. The integrated auxiliary trip uses order code 3VA9688-0BL30 for replacement. No communication module or ground-fault monitoring on this variant — keep it simple for line-protection duty.