WKC 3 Pole 10kA MCB – 6A B Curve (WKC306B)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WKC306B 3 Pole 10kA MCB is a compact B Curve breaker rated at 6A, designed to protect three-phase circuits from overload and short-circuit faults. Built with a 10kA breaking capacity, it’s ideal for commercial and industrial distribution boards, EV chargers, and solar PV systems. Fully compliant with BS 7671...
The WKC306B 3 Pole 10kA MCB is a compact B Curve breaker rated at 6A, designed to protect three-phase circuits from overload and short-circuit faults. Built with a 10kA breaking capacity, it’s ideal for commercial and industrial distribution boards, EV chargers, and solar PV systems. Fully compliant with BS 7671 (18th Edition), it offers both switching and isolation functionality in one DIN-rail mounted device.
Installer Tip: Choose the B Curve version for resistive loads such as lighting and socket circuits. For inductive or high-inrush applications, see the C Curve or D Curve alternatives.
Key Features
- 6A rated current – protects small three-phase loads
- B Curve tripping – trips at 3–5x In, ideal for resistive circuits
- 10kA breaking capacity – handles high fault levels
- 3-pole design – protects three-phase circuits
- Bi-directional: connect from top or bottom
- Applications: lighting, socket circuits, small three-phase boards
Compare 6A 3 Pole Variants
| Model | Curve | Rated Current | Breaking Capacity |
|---|---|---|---|
| WKC306B (This Product) | B Curve | 6A | 10kA |
| WKC306C | C Curve | 6A | 10kA |
| WKC306D | D Curve | 6A | 10kA |
What’s the difference between B, C, and D curve MCBs?
B Curve trips at 3–5x rated current, suited to resistive loads. C Curve trips at 5–10x In for inductive loads like motors or EV chargers. D Curve trips at 10–20x In for high inrush loads such as welders.
Why choose a 10kA MCB?
A 10kA MCB can safely interrupt fault currents up to 10,000A, making it suitable for commercial and industrial boards with higher fault levels.
Is this breaker bi-directional?
Yes – it can be wired from the top or bottom terminals, giving flexibility in installs.
Can I use this in EV and solar installs?
Yes – it’s widely used in EV charger circuits and solar PV systems that require 3-pole protection.
What other ratings are available?
The WKC range covers 6A to 63A, available in B, C, and D curves. Explore our MCB collection for the full series.
- Product Code: WKC306B
- Type: Miniature Circuit Breaker (MCB)
- Poles: 3P (three-phase)
- Rated Current: 6A
- Curve: B Curve
- Breaking Capacity: 10kA
- Mounting: DIN rail (18mm per module)
- Function: Overload & short-circuit protection, switching, isolation
- Compliance: BS 7671 (18th Edition)
- Endurance: 4000 mechanical / 2000 electrical operations
- Brand: WCED
Install this MCB in a standard DIN-rail consumer unit or distribution board. Selection must be based on load type:
- B Curve: for resistive loads (lighting, socket outlets)
- C Curve: for inductive loads (motors, HVAC, EV chargers)
- D Curve: for high inrush loads (welders, transformers, machinery)
Ensure the fault level at the installation site is compatible with the 10kA breaking capacity. All installation must be performed by a qualified electrician in line with BS 7671.
