It carries 63 A continuously at 40 °C ambient, with no derating needed up to 50 °C — it holds 63 A all the way to that point, then drops to 62 A at 55 °C and 58 A at 70 °C. That thermal curve means it fits a 63 A bus without oversizing the breaker for typical panel ambient conditions. Breaking capacity is 52.5 kA at 240 V, 32 kA at 415 V, and 13.6 kA at 440 V. That 52.5 kA at 240 V covers high-fault service-entrance applications; the 32 kA at 415 V suits most European industrial distribution panels.
The 76.2 mm width is a standard 3-module footprint on DIN rail — it occupies the same three 25.4 mm slots as a typical 3-pole miniature breaker, so it drops into existing DIN-rail panels without re-drilling the gland plate. Depth of 70 mm leaves clearance behind a standard 120 mm deep enclosure. The auxiliary switches report breaker position back to a PLC or status light — no separate limit switch needed.
Maximum power loss is 19.8 W at rated current. In a sealed, uncooled panel with multiple breakers, that heat adds to the internal rise — plan for ventilation or derating if the enclosure is small and tightly packed.