WKC 3 Pole 10kA MCB – 50A C Curve (WKC350C)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WKC350C 3 Pole 10kA MCB is a 50A C Curve miniature circuit breaker designed to protect three-phase circuits from overloads and short-circuits. With a 10kA breaking capacity and full compliance with BS 7671 (18th Edition), it’s a dependable choice for medium-to-heavy inductive loads including EV chargers, HVAC systems, motors,...
The WKC350C 3 Pole 10kA MCB is a 50A C Curve miniature circuit breaker designed to protect three-phase circuits from overloads and short-circuits. With a 10kA breaking capacity and full compliance with BS 7671 (18th Edition), it’s a dependable choice for medium-to-heavy inductive loads including EV chargers, HVAC systems, motors, and solar PV installs. Bi-directional, compact, and DIN rail mountable, it ensures safe and flexible protection across commercial and industrial boards.
Installer Tip: Use C Curve MCBs when dealing with inductive circuits that draw moderate inrush currents. For resistive loads, check the B Curve model. For very high inrush circuits, select the D Curve.
Key Features
- 50A rated current – protects medium-to-large three-phase circuits
- C Curve tripping – operates at 5–10x In
- 10kA breaking capacity – safe disconnection under fault conditions
- 3 Pole design: provides full three-phase protection
- Bi-directional: wiring possible from top or bottom
- Applications: EV chargers, HVAC, motors, industrial machinery, PV systems
Compare 50A 3 Pole Variants
| Model | Curve | Rated Current | Breaking Capacity |
|---|---|---|---|
| WKC350B | B Curve | 50A | 10kA |
| WKC350C (This Product) | C Curve | 50A | 10kA |
| WKC350D | D Curve | 50A | 10kA |
Where is the WKC350C best used?
In medium-to-heavy duty three-phase circuits such as HVAC, motors, EV chargers, and solar PV installations.
How does C Curve compare with B and D?
B Curve trips at 3–5x In (resistive loads). C Curve trips at 5–10x In (inductive loads). D Curve trips at 10–20x In (high inrush loads).
What does 10kA breaking capacity mean?
It’s the maximum short-circuit current the breaker can safely interrupt without failure — standard for commercial and industrial installations.
Is the WKC350C bi-directional?
Yes — it supports wiring from both top and bottom terminals.
Is it EV and PV compatible?
Yes — it’s often used in EV charging boards and solar PV distribution panels.
- Product Code: WKC350C
- Type: Miniature Circuit Breaker (MCB)
- Poles: 3P (three-phase)
- Rated Current: 50A
- 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
Install on DIN rails inside consumer units or distribution boards. Choose curve carefully:
- B Curve: resistive loads (e.g. lighting, socket circuits)
- C Curve: inductive loads (motors, HVAC, EV chargers)
- D Curve: heavy inrush applications (e.g. welders, transformers)
Confirm fault levels do not exceed the 10kA rating. Installation must follow BS 7671 and be performed by a qualified electrician.
