WKC 3 Pole 10kA MCB – 10A D Curve (WKC310D)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WKC310D 3 Pole 10kA MCB is a 10A D Curve breaker designed for three-phase circuits subject to high inrush currents. With a 10kA breaking capacity and full compliance with BS 7671 (18th Edition), it provides safe overload and short-circuit protection for industrial machinery, welders, and large motors. DIN rail...
The WKC310D 3 Pole 10kA MCB is a 10A D Curve breaker designed for three-phase circuits subject to high inrush currents. With a 10kA breaking capacity and full compliance with BS 7671 (18th Edition), it provides safe overload and short-circuit protection for industrial machinery, welders, and large motors. DIN rail mounted, compact, and bi-directional, this breaker is a robust choice for demanding commercial and industrial installs.
Installer Tip: Use D Curve MCBs only where circuits have very high inrush. For resistive or light inductive loads, see the B Curve or C Curve models.
Key Features
- 10A rated current – suited for smaller high-inrush three-phase circuits
- D Curve tripping – trips at 10–20x In
- 10kA breaking capacity – handles demanding fault conditions
- 3 Pole design: provides full three-phase protection
- Bi-directional: flexible top or bottom wiring
- Applications: welders, large motors, heavy plant, industrial equipment
Compare 10A 3 Pole Variants
| Model | Curve | Rated Current | Breaking Capacity |
|---|---|---|---|
| WKC310B | B Curve | 10A | 10kA |
| WKC310C | C Curve | 10A | 10kA |
| WKC310D (This Product) | D Curve | 10A | 10kA |
When should I use the WKC310D?
When protecting three-phase circuits with very high inrush, such as industrial welders, transformers, or heavy motors.
How does D Curve compare with B and C?
B Curve trips at 3–5x In for resistive loads, C Curve trips at 5–10x In for inductive loads, while D Curve trips at 10–20x In for heavy-duty inrush applications.
What does 10kA breaking capacity mean?
It’s the maximum fault current the breaker can safely interrupt without damage, ensuring reliability in industrial boards.
Is the WKC310D bi-directional?
Yes — it can be connected from either top or bottom terminals.
Can this breaker be used for EV or PV installs?
It’s rarely needed for EV or PV. Instead, it’s designed for high inrush machinery. For EV or PV, use B or C Curve models.
- Product Code: WKC310D
- Type: Miniature Circuit Breaker (MCB)
- Poles: 3P (three-phase)
- Rated Current: 10A
- Curve: D 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
Install in industrial or commercial boards where inrush is significant. Curve selection is critical:
- B Curve: lighting, sockets (resistive)
- C Curve: motors, HVAC, EV chargers (moderate inrush)
- D Curve: welders, transformers, machinery (very high inrush)
Confirm the fault current does not exceed 10kA. Installation must follow BS 7671 and be carried out by a qualified electrician.
