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The WKC420B is a 20A 4 pole 10kA Miniature Circuit Breaker (MCB) designed for three-phase + neutral protection. With its B Curve trip characteristic, it is best suited for resistive loads such as small power circuits, lighting systems, and distribution boards in three-phase networks, EV charger boards, and solar PV installs.
Offering a 10kA breaking capacity, the WKC420B provides reliable overload and short-circuit protection while isolating all live conductors and neutral. It is bi-directional, DIN-rail mounted, and manufactured to BS 7671 (18th Edition) standards.
Installer Tip: Choose the 20A B Curve when you need to protect small to medium resistive loads. Always confirm fault current capacity of the board does not exceed 10kA before selection.
Key Features
- 20A 4 Pole MCB – B Curve trip characteristic
- 10kA breaking capacity – suitable for commercial installs
- Four-pole protection – L1, L2, L3 + Neutral
- Bi-directional feed – top or bottom entry
- DIN-rail mounted – 18mm per module
- Complies with BS 7671 (18th Edition)
Compare WKC 4 Pole 10kA MCBs (B Curve)
| Model | Rating | Curve | Breaking Capacity |
|---|---|---|---|
| WKC416B | 16A | B Curve | 10kA |
| WKC420B (This Product) | 20A | B Curve | 10kA |
| WKC425B | 25A | B Curve | 10kA |
| WKC432B | 32A | B Curve | 10kA |
