At 40 °C it carries 50 A continuous, with the ampacity holding flat through 50 °C before a gradual derating curve begins — 49 A at 55 °C, 48 A at 60 °C, down to 45 A at 70 °C. That thermal profile means this breaker delivers its full rating across typical panel ambient conditions without headroom loss. Breaking capacity is the headline spec here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V. Those numbers place it in the high-interrupting category for an MCCB — it clears fault currents that would vaporize a standard thermal-magnetic breaker, so it suits high-capacity transformer secondaries or bus-tie positions where available fault current is extreme.
Panel integration
Maximum power loss is 14.6 W — a factor for thermal budgeting in sealed enclosures. The 70 °C operating ceiling matches the top of the derating curve, so the breaker runs at its published ratings across the full ambient span without additional margin required.