CNC NV821471 Miniature Circuit Breaker, 1-Pole, 50A, C Curve, 6kA Breaking Capacity

The CNC NV821471 miniature circuit breaker is a reliable 1-pole protective device designed to safeguard electrical installations against overloads and short circuits. Engineered for seamless integration into residential and commercial electrical distribution systems, this 50A circuit breaker combines robust safety features with durable construction to ensure continuous operation and system protection.

Advantages

This miniature circuit breaker offers dependable protection against both overload and short-circuit conditions. It features an anti-mistake contact terminal block and is built with flame-retardant materials that provide high temperature and impact resistance. For enhanced safety and convenience, it includes a clear contact position indication where red signifies closed and green indicates opened. The device allows for flexible wiring from both top and bottom, supporting cables and pin-type busbars up to 25mm².

Suitable for

• Residential electrical distribution systems
• Commercial building sub-panels
• Overload and short-circuit protection for 50A circuits
• Standard 35mm DIN rail installations

This device may not be suitable for industrial environments requiring multi-pole switching above 1-pole configurations, applications operating outside the specified temperature range of -5°C to +40°C, or circuits exceeding a 50A rated current requirement.

Key specifications

• 1-pole configuration
• Rated current of 50A
• C tripping curve
• 6kA rated breaking capacity
• Rated voltage AC 230/400V
• Insulation voltage of 500V
• Mechanical life of 20000 cycles
• Electrical life of 8000 cycles
• IP20 safety class
• Mounting on standard 35mm DIN rail

How to use

The circuit breaker is designed for professional installation on a standard 35mm DIN rail using its fast clip device. Connect the power supply and load cables or pin-type busbars securely to the terminal blocks, ensuring the cross-sectional area does not exceed 25mm². Connections can be made from either the top or bottom of the device. Verify that the wiring is correct and secure before energizing the circuit. Use the toggle switch to manually operate the breaker, observing the contact position indicator to confirm whether the circuit is opened or closed.

What to consider before purchase

• Verify that the 50A rated current matches your circuit requirements
• Ensure the 1-pole setup is appropriate for your electrical system
• Check that the operating environment stays within the -5°C to +40°C temperature range
• Confirm compatibility with standard 35mm DIN rails and up to 25mm² cable or busbar connections

Always ensure that electrical installation and maintenance are performed by a qualified electrician in accordance with local regulations and safety standards.