It carries a continuous current rating of 20 A across the 40 °C to 55 °C ambient range, derating to 19 A at 60 °C through 70 °C. The TM210 overcurrent release combines a thermal bimetal for overload protection and a magnetic coil for short-circuit response; the fixed thermal element is calibrated for the 20 A frame. The interrupting capacity is what defines this breaker's fault-clearing capability: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. For a 20 A frame, those numbers are high — this is a high-interrupting variant intended for installations with substantial available fault current, such as large panelboards or transformer secondaries where a standard 10 kA or 18 kA MCCB would not hold.
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that mounts on a DIN rail or directly to a mounting plate. Depth of 70 mm (2.76 in) leaves clearance for rear-connected bus bars or cable lugs.
Rated current: 20 A (continuous at 40–55 °C ambient). Poles: 3. Interrupting capacity: 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, 7.5 kA at 500 V and 690 V. Overcurrent release: TM210 thermal-magnetic, fixed. Auxiliary release: shunt trip (STL). Insulation voltage: 800 V. Power loss: 12 W max.