The Siemens SENTRON 3VA2063-5HL36-0DC0 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. That 63 A holds at every 5 °C step, so it's a straight pick for a 63 A feeder or motor branch without recalculating for panel heat. Breaking capacity is the headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. At 690 V the 3 kA rating limits it to lower-fault applications or upstream current-limiting coordination. Two HQ auxiliary switches are fitted as standard.
Power loss and operating range
The 70 °C operating ceiling matches the full-load current rating, so no additional derating above 40 °C is required.