MCB 3P C-Curve, 10kA

CHINT NB1-63H-3P – 3-Pole Miniature Circuit Breaker

The CHINT NB1-63H-3P is a dependable miniature circuit breaker designed for the protection of three-phase electrical systems. It provides accurate overload and short-circuit protection while ensuring full isolation of all three phases, making it suitable for residential, commercial and light-industrial applications.

Key Features

• 3-pole design for balanced protection of three-phase circuits.
• Thermal-magnetic trip mechanism for consistent overload and fault detection.
• Compact DIN-rail mounting for quick installation and clean DB layouts.
• High-strength housing engineered for long-term reliability.
• Clear ON/OFF indication for improved operational safety.
• Suitable for new installations or distribution board upgrades.

Typical Applications

• Main and sub-distribution boards.
• Three-phase circuits in homes, businesses and workshops.
• Motors, pumps, HVAC systems and general three-phase loads.
• Solar inverter AC output distribution.
• Generator and backup power systems.

Installation Notes

• Install on a standard 35 mm DIN rail inside an approved enclosure.
• Ensure correct phase connection (L1, L2, L3).
• Use suitable cable sizes and follow torque specifications.
• Coordinate with upstream and downstream protection for optimal selectivity.

The NB1-63H-3P offers reliable three-phase protection in a compact and installer-friendly format, making it a trusted choice for professional electricians and solar installers alike.