Three poles, rated 63 A continuous at 40 °C, and it holds that rating flat through 50 °C before a gentle derate curve: 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, 58 A at 70 °C. That means in a warm panel or a nacelle cabinet you lose only a few amps, not a full thermal step.
Breaking capacity — the real fault-handling headroom
This MCCB carries 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. On a 480 V panel in North America or a 400 V IEC distribution board, you have headroom well above typical utility fault levels — selectivity with upstream gear is achievable without oversizing.
The two HQ aux switches give status feedback (open/closed) for a PLC or annunciator without adding a separate accessory module.
Panel fit and environment
Dimensions: 130 mm high, 76.2 mm wide, 70 mm deep — a 3-pole MCCB that fits a standard distribution board footprint. Maximum power loss 19.8 W at rated load; that matters for thermal calculations inside a sealed enclosure.
Lifecycle stage is current — this is an active, in-production catalog item from Siemens SENTRON. No phase-out or last-time-buy notice on record.