WKC 3 Pole 10kA MCB – 63A C Curve (WKC363C)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WKC363C 3 Pole 10kA MCB is a 63A C Curve breaker designed for heavy three-phase circuits that need reliable overload and short-circuit protection. With a 10kA breaking capacity and full compliance with BS 7671 (18th Edition), it’s a trusted choice for industrial boards, EV charging systems, solar PV arrays,...
The WKC363C 3 Pole 10kA MCB is a 63A C Curve breaker designed for heavy three-phase circuits that need reliable overload and short-circuit protection. With a 10kA breaking capacity and full compliance with BS 7671 (18th Edition), it’s a trusted choice for industrial boards, EV charging systems, solar PV arrays, and HVAC installations. Compact, DIN rail mountable, and bi-directional, it provides flexibility and safety for demanding installs.
Installer Tip: Use C Curve breakers for inductive loads like motors, HVAC, and EV chargers. For resistive loads, see the B Curve. For heavy inrush machinery, switch to the D Curve.
Key Features
- 63A rated current – protects high-demand three-phase circuits
- C Curve tripping – trips at 5–10x In, ideal for inductive loads
- 10kA breaking capacity – safe operation under high fault levels
- 3 Pole design: covers all three phases
- Bi-directional: wiring possible from either top or bottom
- Applications: industrial distribution, EV chargers, solar PV, HVAC, machinery
Compare 63A 3 Pole Variants
| Model | Curve | Rated Current | Breaking Capacity |
|---|---|---|---|
| WKC363B | B Curve | 63A | 10kA |
| WKC363C (This Product) | C Curve | 63A | 10kA |
| WKC363D | D Curve | 63A | 10kA |
Where is the WKC363C commonly used?
In high-demand three-phase installations such as industrial boards, HVAC systems, solar PV arrays, and EV charger infrastructure.
How does C Curve compare to B and D?
B Curve trips at 3–5x In (resistive). C Curve trips at 5–10x In (inductive). D Curve trips at 10–20x In (heavy inrush).
What does 10kA breaking capacity mean?
It indicates the maximum short-circuit current the MCB can safely interrupt without damage.
Is it bi-directional?
Yes — can be connected from top or bottom terminals.
Is this suitable for EV and PV setups?
Yes — often used in EV charging boards and solar PV installations.
- Product Code: WKC363C
- Type: Miniature Circuit Breaker (MCB)
- Poles: 3P (three-phase)
- Rated Current: 63A
- Curve: C Curve
- Breaking Capacity: 10kA
- Mounting: DIN rail, 18mm per module
- Functions: Overload & short-circuit protection, switching, isolation
- Compliance: BS 7671 (18th Edition)
- Endurance: 4000 mechanical / 2000 electrical operations
- Brand: WCED
DIN rail mounted MCB for three-phase commercial and industrial boards. Curve type should match load type:
- B Curve: general lighting and sockets
- C Curve: inductive loads such as motors, EV chargers, HVAC
- D Curve: heavy inrush equipment (welders, transformers)
Ensure the system’s fault level is within the 10kA breaking capacity. Must be installed by a qualified electrician in line with BS 7671.
