It carries a 40 A continuous rating at 40 °C ambient and holds that rating through 50 °C, derating only to 37 A at 70 °C — useful if the breaker sits near other heat sources in a packed panel. Three-pole construction, TM210 thermal-magnetic release. The TM210 is a fixed thermal, fixed magnetic trip — no adjustment dials, which simplifies spec but means the breaker is matched to a specific load current at order time. Interrupting capacity is the headline here: 220 kA at 240 V AC, 154 kA at 415 V, 121 kA at 440 V, still 17 kA at 690 V. The 17 kA at 690 V means it can also serve 690 V distribution in regions where that is standard, though the high-end interrupting drops sharply above 500 V.
Sourcing & Lifecycle — Current Production
Rated insulation voltage 800 V, front-side IP40 protection (finger-safe from the front, but the back and sides are open to the panel environment). Power loss 10.8 W maximum at rated load — plan for that heat in the enclosure thermal budget.
Width 76.2 mm (3 in), depth 70 mm (2.76 in), height 130 mm (5.12 in). Standard MCCB footprint for the 40 A frame class. Mounts via screw-clamp to a backplate or DIN-rail adapter (not included). The 3-pole width means it occupies three 25.4 mm pole spaces — typical for this class.