Rated 63 A continuous at 40 °C through 50 °C, it holds that rating without derating across the most common panel ambient range; at 70 °C it still carries 58 A. The TM220 overcurrent release combines a thermal bimetal for overloads and a magnetic trip for short-circuits, adjustable to match the cable ampacity. Breaking capacity is the headline here: 187 kA at 240 V AC, 121 kA at 415 V, and 75.6 kA at 440 V. Those figures mean this breaker handles high-fault-current scenarios typical of large transformer secondaries or industrial switchboards — a standard 10 kA or 25 kA MCCB would weld its contacts in the same fault.
Three-pole, 76.2 mm wide (3 in), 130 mm tall, 70 mm deep — fits standard SENTRON 3VA mounting bases and busbar systems. If you need shunt trip, UVR, or aux contacts, those are add-on accessories that mount to the same frame.