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Why Choose CWNE Miniature Circuit Breakers

CWNE produces miniature circuit breakers and RCBOs under ISO 9001, ISO 14001 and OHSAS 18001 management systems with CCC-certified products. The WB1 and WB2 ranges cover 1 A to 125 A for residential, commercial and industrial final circuits.

Applications

Miniature Circuit Breaker FAQ

What is the difference between type C and type D?

Type C suits lighting and general circuits with moderate inrush; type D tolerates the higher inrush of motors and transformers.

What is the difference between an MCB and an RCBO?

An MCB provides overload and short-circuit protection. An RCBO adds residual current (earth-leakage) protection in the same device.

What current range do you offer?

CWNE miniature circuit breakers cover rated currents from 1 A to 125 A.

How to Choose a Miniature Circuit Breaker

Choose a miniature circuit breaker by rated current and voltage, trip curve and breaking capacity, then decide whether earth-leakage protection is needed.

Pick the curve

Use type C for lighting and general circuits with moderate inrush current, and type D for motors and transformers with high inrush current.

Decide MCB or RCBO

An MCB provides overload and short-circuit protection. An RCBO adds residual current (earth-leakage) protection in the same device for circuits feeding socket outlets and equipment.

Confirm the parameters

  • Rated current (1 A to 125 A across the range) and voltage.
  • Number of poles and the required breaking capacity.
  • Whether earth-leakage protection and an over-voltage option are required.

What to send for a quotation

Provide the rated current, curve (C or D), number of poles, breaking capacity, any earth-leakage requirement and quantity.

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