25A 4 Pole 10kA MCB D Curve – WKC425D
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WKC425D is a 25A 4 pole 10kA Miniature Circuit Breaker (MCB) designed for three-phase + neutral protection. With a D Curve trip characteristic, this breaker is engineered for very high inrush load circuits such as welders, transformers, heavy industrial motors, and machinery. It is widely used in industrial distribution...
The WKC425D is a 25A 4 pole 10kA Miniature Circuit Breaker (MCB) designed for three-phase + neutral protection. With a D Curve trip characteristic, this breaker is engineered for very high inrush load circuits such as welders, transformers, heavy industrial motors, and machinery. It is widely used in industrial distribution boards, EV charging infrastructure, and solar PV systems.
Rated to 10kA breaking capacity, the WKC425D provides overload and short-circuit protection while fully isolating all three phases and neutral. It is DIN-rail mountable, bi-directional, and compliant with BS 7671 (18th Edition).
Installer Tip: The 25A D Curve breaker is ideal for machinery circuits and motor-driven systems with very high start-up currents. Always check that the board fault current ≤10kA.
Key Features
- 25A 4 Pole MCB – D Curve trip profile
- 10kA breaking capacity – heavy-duty protection for industrial circuits
- Full isolation: L1, L2, L3 + Neutral
- Bi-directional feed: install top or bottom
- DIN-rail mounting: 18mm width per module
- Conforms to BS 7671 (18th Edition)
Compare WKC 4 Pole 10kA MCBs (D Curve)
| Model | Rating | Curve | Breaking Capacity |
|---|---|---|---|
| WKC420D | 20A | D Curve | 10kA |
| WKC425D (This Product) | 25A | D Curve | 10kA |
| WKC432D | 32A | D Curve | 10kA |
| WKC440D | 40A | D Curve | 10kA |
What applications is the WKC425D suitable for?
It’s designed for industrial equipment like welders, transformers, and heavy-duty motors with very high inrush currents.
Why select a D Curve instead of C Curve?
D Curve breakers allow for much higher inrush tolerance, preventing nuisance tripping in demanding applications.
Can the WKC425D be used in EV charging systems?
Yes — particularly in industrial EV charging infrastructure with heavy loads, provided fault level ≤10kA.
Does the WKC425D meet UK regulations?
Yes, it complies with BS 7671 (18th Edition) and IEC/EN 60898-1.
- Model: WKC425D
- Type: Miniature Circuit Breaker (MCB)
- Current Rating: 25A
- Curve: D Curve
- Poles: 4P (L1, L2, L3 + Neutral)
- Breaking Capacity: 10kA
- Mounting: 35mm DIN rail, 18mm per pole
- Dimensions: Approx. 72mm (W) x 90mm (H) x 77mm (D)
- Compliance: BS 7671 (18th Edition), IEC/EN 60898-1
- Brand: WCED
The WKC425D must be installed by a qualified electrician in accordance with BS 7671.
- DIN rail mounting (18mm per pole)
- Confirm prospective fault current ≤10kA
- Designed for heavy inrush load circuits (D Curve)
- Tighten terminals to recommended torque spec
- Ensure enclosure space for 4P breaker units
