EATON NZMH3-AE630 3-Pole 630A Electronic Circuit Breaker BG3

With a rated short-circuit breaking capacity of 50 kA at 400/415 V, the EATON NZMH3-AE630 delivers uncompromising protection for demanding low-voltage power distribution. This 3-pole circuit breaker is engineered to handle 630 A continuous current, making it a cornerstone for industrial installations where reliability is non-negotiable.

Overview

The NZMH3-AE630 belongs to EATON's proven NZM series, offering a compact BG3 frame size without sacrificing performance. Its electronic trip unit (AE) provides precise, adjustable overload and short-circuit protection, ensuring optimal coordination with downstream devices. Rated for 690 V AC operation, it is well-suited for global applications.

What stands out

• High breaking capacity: 50 kA at 400/415 V, 30 kA at 690 V
• Adjustable overload protection from 315 A to 630 A (0.5–1 × In)
• Short-circuit delay adjustable from 1260 A to 6300 A (2–10 × In)
• Instantaneous trip fixed at 6300 A (10 × In) for rapid fault clearing
• Complies with IEC/EN 60947-2 for assured quality and safety

Technical details

• Poles: 3
• Rated current (In): 630 A
• Frame size: BG3
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 1000 V
• Rated impulse withstand voltage (Uimp): 8 kV
• Mounting: Fixed installation
• Protection functions: Overload, short-circuit

Our verdict

For heavy-duty power distribution, the EATON NZMH3-AE630 offers a perfect balance of performance, adjustability, and compliance. Its electronic trip unit ensures precise protection, while the robust construction and high breaking capacity make it a reliable choice for critical industrial applications.