Rated 125 A continuously at 40 °C ambient, it holds that full rating through 50 °C, then derates linearly: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C (–). That thermal curve matters when the breaker lives in a crowded panel — if your enclosure ambient runs 55 °C, the usable continuous current is 122 A, not 125 A. At 240 V AC it clears 187 kA; at 415 V it's 121 kA; at 440 V it drops to 75.6 kA; and at 500 V and 690 V it holds at 7.5 kA. The overcurrent release is a TM120M — a thermal-magnetic unit with fixed thermal and magnetic settings matched to the 125 A frame. No ground-fault monitoring, no communication function, no voltage trigger. This is a straightforward, hardened protection device for motor circuits.
Power loss at rated load is 30.6 W maximum — relevant for thermal coordination in sealed enclosures.
Panel integration — what fits where
The 3VA1112-5MH32-0DA0 occupies a 76.2 mm wide by 130 mm tall footprint with 70 mm depth behind the panel (–). The undervoltage release adds a pair of control wires; verify the coil voltage matches your control circuit before terminating. No auxiliary contacts are included on this variant — if you need alarm or position feedback, order the accessory kit separately.