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NW12H1 - 1250 A

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Parameter Specification Model MasterPact?NW20H1 Rated Current (In) 2000?A @ 40?°C Poles 3?pole (phase conductors); also available 4?pole version Rated Insulation Voltage (Ui) 1000?V AC Rated Operational Voltage (Ue) Up to 690?V AC
50/60?Hz Breaking Capacity (Icu / Ics) 65?kA (220–690?VAC) Short-Time Withstand (Icw) 65?kA for 1?s; 36?kA for 3?s Making Capacity (Icm) 143?kA @ 525–690?VAC Impulse Withstand Voltage (Uimp) 12?kV Mounting Style Draw-out frame; supports isolation Mechanical Endurance 10
000 cycles (without maintenance); 20
000 with maintenance Electrical Endurance Up to 6000 cycles (AC?23A rated) Response Times Trip ??25?ms; Closing	approx. 49.5?kg) Operating Temperature –25?°C to +70?°C; Storage –40?°C to +85?°C Standards & Certifications IEC?60947?1/2; EN/IEC?60947?2; CE; CCC; EAC; UL listed flood/CSA listing (draw?out)

The Schneider Electric / Square?D MasterPact?NW20H1 is a high-capacity 2000?A, 3?pole (optionally 4?pole), draw?out air circuit breaker designed for low-voltage power distribution. Featuring H1 performance with a 65?kA breaking capacity at 440?VAC, it offers robust protection and isolation in industrial and commercial applications. The breaker frame is provided without a trip unit, allowing customization with Micrologic or other compatible trip mechanisms.