Professional Manufacturer of 40A DC MCB from China
Langir's 40A DC MCB Has the Confidence to Safely Protect Your Circuits
Langir’s 40a dc mcb can be easily mounted on a circuit board and it is firmly mounted and not easily damaged, so it does not need to be replaced frequently. 40 amp dc mcb cases are usually made of high temperature and low temperature impact resistant materials that are hard and durable. Installation is also very easy, requiring no special tools or specialist skills, just a simple screwdriver and other tools to install, very simple and easy to use.
Langir’s 40a dc mcb can be used to protect batteries and motors in cars, electronic equipment in aircraft, or lighting systems in ships, and can be used in many other applications.
The 40 amp dc mcb is also available in different poles, usually 1, 2, 3 and 4poles. In DC circuits, the right number of poles needs to be selected to protect the safety and stability of the circuit.
As there is not much difference between 40 and 32 amps, the 40 amp dc mcb and 32 amp dc mcb have the same 3.5 square metres of copper wire, so the difference in weight of the product is not too great at around 122g.
40A DC MCB Range
Certificates & Insurance




Why Choose us?
- High rated current, suitable for large circuit equipment.
- Wide range of rated voltage, such as 250dc,500vdc, 1000vdc and other voltage options.
- Multiple poles, 1 pole, 2 poles, 3 poles and 4 poles can be selected.
- At present, we also develop 125A and bigger current.

40A DC MCB Installing

Regarding how to install the it in the distribution box, guide rails and screw accessories of appropriate length are necessary. If you also need guide rails or other accessories, you can contact us to purchase and deliver them together. Langir will provide all facilities for your convenience for one-stop shopping and save your time and cost.
For small orders, Langir will use express delivery like FedEx, UPS, DHL, EMS, and TNT.
These deliveries are door to door service.
While for big orders, Langir will send them either via air or sea.
Langir will guarantee safe and protected order packaging to ensure that the products will arrive in good condition and ready for installation.
Langir keeps them in stock. If sufficient stock is available, your order will be delivered within 2 to 3 days of confirmation.
However, in the rare event of a shortage, you will be notified immediately.
Langir will ensure that you receive your order intact and hassle free.
Yes, Langir offers a 365-day warranty on all of its products.
But all of Langir’s products are of world-class quality to ensure your satisfaction.