6A 4 Pole 10kA MCB B Curve – WKC406B
£17.85
ex VAT
£21.42 inc VAT
SKU: WKC406B
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...
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Description
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 |
Technical specs
- 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 notes
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
FAQs
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.
