40A 4 Pole 10kA MCB C Curve – WKC440C
£17.85
ex VAT
£21.42 inc VAT
SKU: WKC440C
The WKC440C is a 40A 4 pole 10kA Miniature Circuit Breaker (MCB) designed for three-phase + neutral protection. With its C Curve trip profile, it is built for inductive load circuits such as motors, pumps, HVAC systems, EV chargers, and commercial lighting in three-phase boards, EV installations, and solar PV...
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Description
The WKC440C is a 40A 4 pole 10kA Miniature Circuit Breaker (MCB) designed for three-phase + neutral protection. With its C Curve trip profile, it is built for inductive load circuits such as motors, pumps, HVAC systems, EV chargers, and commercial lighting in three-phase boards, EV installations, and solar PV setups.
Rated to 10kA breaking capacity, the WKC440C provides safe overload and short-circuit protection while ensuring complete neutral isolation. It is DIN-rail mounted, bi-directional, and compliant with BS 7671 (18th Edition).
Installer Tip: A 40A C Curve is widely used for larger inductive loads such as HVAC compressors, pumps, and EV distribution panels. Ensure that prospective fault current does not exceed 10kA.
Key Features
- 40A 4 Pole MCB – C Curve characteristic
- 10kA breaking capacity – robust for commercial & industrial boards
- Neutral isolation: full 4P switching (L1, L2, L3, N)
- Bi-directional feed: install top or bottom
- DIN-rail mounted: 18mm width per pole
- Meets BS 7671 (18th Edition) compliance
Compare WKC 4 Pole 10kA MCBs (C Curve)
| Model | Rating | Curve | Breaking Capacity |
|---|---|---|---|
| WKC432C | 32A | C Curve | 10kA |
| WKC440C (This Product) | 40A | C Curve | 10kA |
| WKC450C | 50A | C Curve | 10kA |
| WKC463C | 63A | C Curve | 10kA |
Technical specs
- Model: WKC440C
- Type: Miniature Circuit Breaker (MCB)
- Current Rating: 40A
- Curve: C Curve
- Poles: 4P (L1, L2, L3 + Neutral)
- Breaking Capacity: 10kA
- Mounting: 35mm DIN rail, 18mm per module
- Dimensions: Approx. 72mm (W) x 90mm (H) x 77mm (D)
- Standards: BS 7671 (18th Edition), IEC/EN 60898-1
- Brand: WCED
Installation notes
The WKC440C must be installed by a qualified electrician in line with BS 7671 regulations.
- Mount on 35mm DIN rail (18mm per pole)
- Ensure prospective fault current ≤10kA
- For inductive/moderate inrush loads (C Curve)
- Tighten terminals to recommended torque
- Allow sufficient space for 4P breakers in the enclosure
FAQs
What applications is the WKC440C used for?
It’s widely used for HVAC compressors, pumps, and larger inductive loads in commercial and industrial systems.
Why use a C Curve instead of B Curve?
C Curve breakers handle higher inrush currents, making them suitable for inductive loads where B Curve breakers may nuisance trip.
Can this be used for EV charger distribution?
Yes — the 40A C Curve is ideal for EV distribution boards with moderate inrush loads, provided the system fault level ≤10kA.
Does this product meet compliance standards?
Yes, the WKC440C is compliant with BS 7671 (18th Edition) and IEC/EN 60898-1.
