WKC 3 Pole 10kA MCB – 25A C Curve (WKC325C)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WKC325C 3 Pole 10kA MCB is a 25A C Curve breaker designed for reliable protection of three-phase circuits in commercial, industrial, and renewable applications. With a 10kA breaking capacity and compliance with BS 7671 (18th Edition), it’s ideal for inductive loads with moderate inrush such as EV chargers, HVAC,...
The WKC325C 3 Pole 10kA MCB is a 25A C Curve breaker designed for reliable protection of three-phase circuits in commercial, industrial, and renewable applications. With a 10kA breaking capacity and compliance with BS 7671 (18th Edition), it’s ideal for inductive loads with moderate inrush such as EV chargers, HVAC, motors, and solar PV systems. Compact, DIN rail mounted, and bi-directional, it ensures safe disconnection and full circuit isolation.
Installer Tip: Use C Curve MCBs for inductive loads with moderate inrush. For resistive loads, see the B Curve. For high inrush machinery, consider the D Curve.
Key Features
- 25A rated current – protects medium three-phase circuits
- C Curve tripping – operates at 5–10x In
- 10kA breaking capacity – ensures safety under fault conditions
- 3 Pole design: covers all three phases
- Bi-directional: flexible top or bottom connection
- Applications: EV chargers, HVAC, motors, industrial boards, PV installs
Compare 25A 3 Pole Variants
| Model | Curve | Rated Current | Breaking Capacity |
|---|---|---|---|
| WKC325B | B Curve | 25A | 10kA |
| WKC325C (This Product) | C Curve | 25A | 10kA |
| WKC325D | D Curve | 25A | 10kA |
Where is the WKC325C used?
In commercial and industrial three-phase circuits drawing 25A, such as HVAC systems, motors, and EV chargers.
How does C Curve differ from B and D?
B Curve trips at 3–5x In for resistive loads. C Curve trips at 5–10x In for inductive loads. D Curve trips at 10–20x In for heavy machinery and high inrush.
What does 10kA breaking capacity mean?
It ensures the MCB can safely disconnect fault currents up to 10,000 amps without damage.
Can I use this for EV or solar installs?
Yes — it’s often specified in EV charging infrastructure and PV boards.
Is this MCB bi-directional?
Yes — wiring can be connected from top or bottom terminals.
- Product Code: WKC325C
- Type: Miniature Circuit Breaker (MCB)
- Poles: 3P (three-phase)
- Rated Current: 25A
- 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 breaker for consumer units and industrial distribution boards. Curve selection is important:
- B Curve: lighting and socket circuits
- C Curve: motors, HVAC, EV chargers (moderate inrush)
- D Curve: heavy inrush loads such as welders and transformers
Ensure the 10kA breaking capacity is appropriate for site fault levels. Installation must follow BS 7671 by a qualified electrician.
