6kA MCB – 25A 1 Pole C Curve (WMC125C)

The WMC125C is a 25A single-pole 6kA miniature circuit breaker with a C Curve tripping characteristic. It provides overload and short-circuit protection for circuits designed for this current rating and curve.

Select the MCB against the connected load, cable rating, prospective fault current and the consumer-unit manufacturer's approved device range. Confirm board and busbar compatibility when replacing or adding a breaker.

Key details

• Part code: WMC125C
• Rated current: 25A
• Trip curve: C
• Pole arrangement: single pole
• Breaking capacity: 6kA

Images may show another WMC variant. Select by the product code, current rating and trip curve stated for this listing.

Compare 25A WMC MCBs

Choose the trip curve specified for the circuit. The same current rating does not make B and C Curve devices interchangeable.

Browse the 6kA MCB range for other ratings, or contact Power & Data UK for the supplied-version specifications and compatibility information.

• Part code: WMC125C
• Rated current: 25A
• Trip curve: C
• Pole arrangement: single pole
• Breaking capacity: 6kA
• Device type: miniature circuit breaker (MCB)
• Protection functions: overload and short-circuit protection

For the exact supplied-version voltage rating, dimensions, mounting details, temperature limits, endurance and applicable product standard, please contact Power & Data UK with part code WMC125C.

A qualified electrician must select, install and test the WMC125C against the circuit design, the board manufacturer's instructions and the applicable BS 7671 requirements.

• Check that a 25A C Curve device is appropriate for the load, cable and required disconnection performance.
• Verify the prospective fault current and protective-device coordination.
• Confirm the consumer unit or distribution board approves this exact MCB and its busbar/terminal arrangement; physical fit alone does not establish compatibility.
• Follow the supplied terminal identification, conductor-capacity and tightening-torque instructions.
• Provide the residual-current protection required for the installation; an MCB does not provide residual-current detection.
• Complete the required inspection, testing and certification before the circuit is put into service.

What current rating and curve is WMC125C?

This listing is for the 25A C Curve single-pole MCB. Match both the rating and trip curve to the circuit specification.

Can I substitute the other 25A curve?

WMC125C and WMC125B have different tripping characteristics. The installer must confirm the required curve and disconnection performance before substitution.

Will it fit every Whitecliffe consumer unit?

Compatibility must be checked against the exact board and the manufacturer's approved devices. A matching rail or similar physical size is not sufficient on its own.

Does this MCB provide residual-current protection?

No. An MCB provides overcurrent protection. Any required residual-current protection must be provided by an appropriate RCD or RCBO arrangement.

What does the 6kA rating mean?

It identifies the stated short-circuit breaking capacity under the device's specified conditions. The installer must check suitability for the prospective fault current and circuit design.