For Canadian requirements, a type “P” fuse is used for non-motor loads and type “D” fuses are used for electric heating and cycling loads circuits. Both fuses have low melting-point temperature elements. Low-Temp time delay plug fuses have thermal sensitivity are also for cycling loads and motor circuits.

Compared with glass tube fuses, blade fuses require only half the parts, their simplified structure is ideal for mass production, and they are smaller, lighter and more durable. Amid the shift toward electronics in the automotive sector, blade fuses were rapidly adopted by automakers around the world.

The current rating for fuses is measured in amps, which is the unit used to measure electrical current. The current rating is basically the maximum current (in amps) that can flow through the fuse under normal conditions without melting the fuse and breaking the current.

Small fuses generally identify the element speed using markings such as F, M, T etc, whilst larger fuses identify the element speed using markings such as gL, gG, aM etc. Some fuses use terms such as slow acting, fast acting, motor rated etc.