Protect your electrical system with the NB163H-3PB20 20A 3-Pole Miniature Circuit Breaker. Built with a high 10kA breaking capacity and B-curve response, it quickly cuts off power during overloads or short circuits—keeping your equipment safe. Its compact DIN-rail design makes installation fast and hassle-free.

The CHINT NB163H-3PB Miniature Circuit Breaker offers dependable protection for low-voltage electrical systems, available in a wide current range from 6A to 63A. Designed with a B-curve tripping characteristic and a high 10kA breaking capacity, it ensures rapid response to overloads and short circuits. Its 3-pole configuration provides balanced phase protection, making it ideal for residential, commercial, and light industrial applications. Compact DIN rail mounting allows for quick and easy installation. 

Technical Specification: 

• Standard:  IEC/EN 60898-1
• Rated Voltage (Ue): AC 415 V
• Rated Insulation Voltage (Ui): 500 V
• Rated Current (In): 20 A 
• Rated Short-Circuit Breaking Capacity (Icu): 10,000 A
• Tripping Characteristics: Type B (3–5 In)
• Rated Frequency: 50/60 Hz
• Rated Impulse Withstand Voltage (Uimp): 6 kV
• Terminal Type: Cable / U-type busbar / Pin-type busbar
• Terminal Capacity: Up to 25 mm²
• Tightening Torque: 2.5 N·m
• Mounting: DIN-rail EN 60715 (35 mm)
• Connection: Top or bottom feed
• Protection Degree: IP20
• Auxiliary Accessories: Click here Auxiliary contact, shunt release, under-voltage release, alarm contact

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