The 3-pole design fits three-phase feeders. Breaking capacity is voltage-dependent: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
If the panel runs hot — near a transformer or in a crowded enclosure — use the 60 °C column (155 A) or 70 °C column (150 A) for your load calculation. The breaker measures 70 mm deep, 76.2 mm wide, and 130 mm high, so it occupies a standard 3-pole MCCB footprint on the DIN rail or mounting plate.
