20A 4 Pole 10kA MCB C Curve – WKC420C
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WKC420C is a 20A 4 pole 10kA Miniature Circuit Breaker (MCB) designed for three-phase + neutral systems. With its C Curve trip characteristic, it is suited to inductive load circuits such as motors, HVAC, pumps, and EV charging sub-circuits in commercial boards, EV distribution setups, and solar PV systems....
The WKC420C is a 20A 4 pole 10kA Miniature Circuit Breaker (MCB) designed for three-phase + neutral systems. With its C Curve trip characteristic, it is suited to inductive load circuits such as motors, HVAC, pumps, and EV charging sub-circuits in commercial boards, EV distribution setups, and solar PV systems.
Offering a 10kA breaking capacity, the WKC420C ensures safe overload and short-circuit protection while isolating all live conductors and neutral. It is bi-directional, DIN-rail mounted, and compliant with BS 7671 (18th Edition).
Installer Tip: The 20A C Curve breaker is a versatile option for medium-duty inductive loads where inrush currents occur, such as fan motors, HVAC, and EV circuits. Confirm system fault level ≤10kA.
Key Features
- 20A 4 Pole MCB – C Curve profile
- 10kA breaking capacity – safe for commercial & industrial installs
- Neutral disconnection: 4P switching (L1, L2, L3, N)
- Bi-directional feed: install top or bottom
- DIN-rail mounting: 18mm per module
- Complies with BS 7671 (18th Edition)
Compare WKC 4 Pole 10kA MCBs (C Curve)
| Model | Rating | Curve | Breaking Capacity |
|---|---|---|---|
| WKC416C | 16A | C Curve | 10kA |
| WKC420C (This Product) | 20A | C Curve | 10kA |
| WKC425C | 25A | C Curve | 10kA |
| WKC432C | 32A | C Curve | 10kA |
What applications is the WKC420C best for?
It is ideal for inductive load circuits including HVAC, pumps, motors, and EV charger sub-circuits.
How does a C Curve compare to B Curve?
C Curve breakers tolerate higher inrush currents, making them suitable for inductive circuits. B Curve is only for resistive loads.
Is this suitable for EV or PV systems?
Yes — particularly in EV distribution or PV installs with moderate inrush currents, provided the board fault level ≤10kA.
Does it meet regulations?
Yes, the WKC420C complies with BS 7671 (18th Edition) and IEC/EN 60898-1 standards.
- Model: WKC420C
- Type: Miniature Circuit Breaker (MCB)
- Current Rating: 20A
- Curve: C Curve
- Poles: 4P (L1, L2, L3 + Neutral)
- Breaking Capacity: 10kA
- Mounting: 35mm DIN rail, 18mm width per pole
- Dimensions: Approx. 72mm (W) x 90mm (H) x 77mm (D)
- Standards: BS 7671 (18th Edition), IEC/EN 60898-1
- Brand: WCED
The WKC420C must be installed by a qualified electrician under BS 7671 regulations.
- DIN rail mounted, 18mm per pole
- Check prospective fault current ≤10kA
- Use on inductive or moderate inrush load circuits (C Curve)
- Tighten terminals to manufacturer torque spec
- Allow space for 4P switching devices in enclosure
