6A 4 Pole 10kA MCB B Curve – WKC406B
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WKC406B is a 6A 4 pole 10kA Miniature Circuit Breaker (MCB) designed for three-phase + neutral circuits. With a B Curve trip characteristic, it is ideal for protecting resistive loads such as lighting and socket circuits in commercial boards, solar PV arrays, and EV charger distribution. Built with a...
The WKC406B is a 6A 4 pole 10kA Miniature Circuit Breaker (MCB) designed for three-phase + neutral circuits. With a B Curve trip characteristic, it is ideal for protecting resistive loads such as lighting and socket circuits in commercial boards, solar PV arrays, and EV charger distribution.
Built with a 10kA breaking capacity, the WKC406B provides overload and short-circuit protection while also offering full neutral disconnection. It is DIN-rail mounted, bi-directional, and compliant with BS 7671 (18th Edition).
Installer Tip: Use the 6A B Curve model for small lighting or control circuits where low fault current protection is sufficient. Always confirm the fault level does not exceed 10kA before selection.
Key Features
- 6A 4 Pole MCB – B Curve characteristic
- 10kA breaking capacity – suitable for commercial & industrial boards
- Neutral switching – 4P protection across L1, L2, L3, N
- Bi-directional – feed top or bottom
- DIN-rail mount – 18mm per module
- Complies with BS 7671 (18th Edition)
Compare WKC 4 Pole 10kA MCBs (B Curve)
| Model | Rating | Curve | Breaking Capacity |
|---|---|---|---|
| WKC406B (This Product) | 6A | B Curve | 10kA |
| WKC410B | 10A | B Curve | 10kA |
| WKC416B | 16A | B Curve | 10kA |
| WKC420B | 20A | B Curve | 10kA |
When should I use a B Curve MCB?
B curve breakers are suitable for resistive loads such as lighting and socket circuits, where inrush currents are low.
What’s the benefit of a 4-pole MCB?
A 4-pole MCB protects all three phases plus the neutral, providing full isolation. This is often required in three-phase boards, EV distribution, and solar PV systems.
What does the 10kA rating mean?
It indicates the maximum short-circuit current the device can safely interrupt. 10kA is a standard requirement for commercial and industrial installations.
Is the WKC406B suitable for solar or EV circuits?
Yes — provided the load type is resistive and the fault level does not exceed 10kA. For inductive or heavy inrush loads, choose a C or D curve alternative.
- Model: WKC406B
- Type: Miniature Circuit Breaker (MCB)
- Current Rating: 6A
- Curve: B Curve
- Poles: 4P (L1, L2, L3 + Neutral)
- Breaking Capacity: 10kA
- Mounting: DIN rail, 18mm per pole
- Dimensions: Approx. 72mm (W) x 90mm (H) x 77mm (D)
- Standards: BS 7671 (18th Edition), IEC/EN 60898-1
- Brand: WCED
Installation of the WKC406B must be carried out by a qualified electrician in accordance with BS 7671 wiring regulations.
- Mount on standard 35mm DIN rail (18mm per module)
- Ensure correct tightening torque on terminals
- Check that circuit fault level does not exceed 10kA
- Select B curve only for resistive loads (e.g. lighting, socket circuits)
- Confirm adequate enclosure space for 4-pole devices
