Cartridge Fuses

What Is a Cartridge Fuse?

A Cartridge fuse is a cheap safety device used to protect electrical equipment and provide circuit protection. Cartridge Fuses are available in a wide variety of sizes, amp and volt ratings up to 600VAC and 600 Amps.

Here at ACDC Drives we stock the full range of cartridge fuses and keep them on the shelf. If you require any specialist fuses that you cannot see listed on our site, please give us a call on 01905 887667 or drop us an email and we will source it for you from one of our many suppliers.

Where is a Cartridge Fuse Used?

Cartridge fuses are used frequently in commercial, industrial and agricultural applications as well as air conditioning, pumps, appliances and other equipment.

Cartridge fuses are available in two types:

• General Purpose fuses have no time-delay and protect fuse panels, appliances and branch circuits.
• Heavy Duty fuses have a time-delay feature, allowing momentary motor start-ups. Both are available in 230VAC and 600VAC versions with a catalogue symbol and amp rating stamped on the knife blade or end cap.

Do I Need a Fuse Holder For Cartridge Fuses?

Yes, you will need a Fuse Holder for these, in the correct configuration. This will need to match the number of poles you wish to protect, and can include blown fuse indicators etc. Please find the correct Fuse Holder here.

How Does a Cartridge Fuse Work?

Inside the fuse is a small metal strip that is connected to both caps at the end of the fuse. If there is a short or fault anywhere in the circuit, or the circuit is overloaded, the metal strip, or link, heats up and quickly melts, which breaks the circuit and stops the flow of electricity. It can only be used once and then needs to be replaced because the ‘link’ is broken.

When replacing a cartridge fuse, the fuses must be identical in their amp and voltage ratings to allow the current to flow once again.

Why use a cartridge fuse?

Cartridge fuses are one of the cheapest ways to protect your circuit from over current and short circuits. They are very safe and do not produce flames or an arc when they break the circuit. Also, if you choose the general purpose option they operate instantaneously ensuring safe operation.