Line protection MCCB, 160 A, 1-pole
It's a line-protection device — meaning it's built for feeder and distribution duty, not motor-starting curves. The short-circuit release (Ii) is fixed at 1,600 A — ten times the continuous rating — so it's coordinated for fast clearing on hard faults without nuisance trips on moderate overloads.
Panel fit and thermal constraints
At 25.4 mm wide (1 inch) and 70 mm deep, this breaker takes one standard DIN-rail position. The thermal derating curve is worth checking before you lock the BOM: full 160 A is good up to 50 °C, then it steps down to 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. If your enclosure runs hot or you're stacking breakers tight, that derating eats into your headroom. Maximum power loss is 12.67 W — negligible for a single unit, but add it up across a multi-breaker panel.
DC capability and environmental limits
The maximum rated DC operational voltage is 125 V — relevant if you're using it in a DC distribution bus or a battery-backed circuit. The insulation voltage (Ui) is rated at 500 V, so it's comfortable in standard 480 V AC panels.