Rated 20 A continuous at 40 °C ambient, it holds that rating through 55 °C and derates to 19 A at 60–70 °C — useful to know if the breaker lands in a warm enclosure or next to other heat sources. Breaking capacity is 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500/690 V — the 121 kA figure at 240 V means it can interrupt very high fault currents common on large-transformer secondary or busway taps without upstream coordination changes.
Shunt trip and auxiliary release
Panel fit and footprint
At 76.2 mm wide (3 in), 130 mm tall (5.12 in), and 70 mm deep (2.76 in), it occupies a standard three-pole MCCB footprint on a DIN rail or panel-mount base — the depth is shallow enough to clear most gland plates and backpanel wiring troughs.