Ceramic Fuse Fast Or Slow

There are a number of different types of fuses available and these differ in size shape and material.

Ceramic fuse fast or slow.

The breaking capacity of a ceramic fuse is important because it defines the amount of current that can be stopped by the fuse. Read the manufacturer s label if it says fast or slow the fuse type is as it is labeled. The marking will be somewhere on the case of the fuse. Fuses made of ceramic also offer protection against overheating.

A thick wire with a tiny spring at one end makes it a slow blow fuse while a thin wire means that it s a fast acting fuse. Also called fast blow ceramic fuses they are highly sensitive to changes in current flow and don t tolerate temporary overload currents or power surges. By using a slow blow fuse you bypass this problem because as mentioned before the slow blow fuses withstands that sudden high current flowing from the circuit enabling the motor to start. There will also be the risk of suffering serious injury or the worst electrocution.

The types of fuses include long time lag or super time lag tt fast acting fuses ff quick blow fuses f and slow blow or time lag fuses t. Other letters will indicate unique fuses for your specific device. Selecting a fast blow fuse is fairly straightforward. The two main materials that are used to manufacture well built fuses are glass and ceramic.

Ceramic and glass are two common materials used to make fuses. This means that ceramic fuses can be used in circuits that have a higher current. The capacity of a ceramic fuse is higher than any other fuse. For example assume a nominal load of 15 amps and an ambient temperature of 105 c.

That means that the fuse is slow acting rated at current of 500 ma for voltages up to 250 v. Fast acting ceramic fuses open within seconds of being exposed to overloads and short circuits. On glass tube fuses it s usually engraved sometimes very badly on the metal part of the body. If it says f it means the fuse is a fast blow and if it says t or s it means it is a slow blow.

Slow or fast blow type fuses are and can be offered in both glass and ceramic bodies. A fuse protects electrical appliances and equipment by breaking the electrical circuit in the event of an overload of current or a short circuit. The bad experience with glass fuses comes from the fact that they re cheaper to build and more ubiquitous conditions that are highly correlated to the abundance of sub standard parts china. There is no good way to non destructively detect what type of fuse a fuse is if it is unmarked.

Start by choosing a fuse rated to carry about 33 percent more than the expected load i e the normal current should be 75 percent of the expected load current then adjust for ambient temperature. Therefore a slow blow fuse is ideal in such circumstances.