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The WKC340B 3 Pole 10kA MCB is a 40A B Curve breaker providing short-circuit and overload protection for three-phase circuits. Built with a 10kA breaking capacity and full compliance with BS 7671 (18th Edition), it’s trusted in industrial boards, EV charging setups, and solar PV systems. Compact, DIN rail mountable, and bi-directional, it delivers safe and reliable disconnection in demanding environments.
Installer Tip: Choose the B Curve for resistive loads such as lighting and socket circuits. For inductive or high inrush loads, see the C Curve or D Curve variants.
Key Features
- 40A rated current – suited for heavier three-phase loads
- B Curve tripping – rapid fault clearance for resistive circuits
- 10kA breaking capacity – safe operation under high fault levels
- 3 Pole design: protection across all three phases
- Bi-directional: top or bottom wiring accepted
- Applications: industrial boards, lighting, sockets, EV/PV circuits
Compare 40A 3 Pole Variants
| Model | Curve | Rated Current | Breaking Capacity |
|---|---|---|---|
| WKC340B (This Product) | B Curve | 40A | 10kA |
| WKC340C | C Curve | 40A | 10kA |
| WKC340D | D Curve | 40A | 10kA |
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