What does the C mean on a fuse?
Class C fuses are not dimensionally or electrically interchangeable with other North American fuses. They feature ceramic bodies and bolt-in mounting. They are for short-circuit protection only, in motor controllers, for example, where overload protection is provided by an overload relay.
How do you know if a ceramic cartridge fuse is blown?
A homeowner can determine if a glass fuse in blown by performing a visual inspection and looking for a break in the thin wire and a brown discoloration in the center of the fuse. A ceramic fuse, however, shows no damage upon visual inspection. Testing a ceramic fuse is the only way to tell if the fuse has blown.
How do you read a fuse number?
Note: Many small cartridge fuses will have additional markings stamped on the end caps. These are usually either; a series number, a part number, or product approval markings (refer table 3 below)….Fuse Markings.
| Marking | Fuse Element Speed |
|---|---|
| M | Medium Acting (Mitteltrage) |
| T | Slow Acting (Trage) |
| TT | Very Slow Acting (Trage Trage) |
Does voltage matter on fuse?
Is the voltage rating important? Yes, very important! The voltage rating of the selected fuse must be greater than or equal to the circuit voltage. Since fuses have such low resistance, the voltage rating becomes critical only when the fuse is trying to open.
Does fuse depend on voltage?
Voltage Rating-Fuses The voltage rating of a fuse must be at least equal to or greater than the circuit voltage. It can be higher but never lower. For instance, a 600V fuse can be used in a 208V circuit. The voltage rating of a fuse is a function of its capability to open a circuit under an overcurrent condition.
What are Class C fuses used for?
Class CC fuses. These non-renewable fuses are current-limiting and intended for the protection of components sensitive to short-time overloads, non-inductive loads, and short-circuit protection of motor circuits. Current ratings range from 0A to 30A, and the voltage rating is 600VAC.
What do letters mean on fuses?
The number and the A (may be mA) is the amp rating of the fuse. The L denotes that it is a low breaking capacity or glass fuse (H is High breaking capacity and is usually a ceramic package).
Can I replace a ceramic fuse with a glass fuse?
With all specifications and safety ratings the same you should be able to go from glass to ceramic but I wouldn’t recommend replacing ceramic with glass.
What is voltage rating of fuse?
The voltage rating is the maximum voltage that the fuse can safely operate at when an overcurrent situation happens. The voltage rating on the fuse can be higher than the voltage present on the circuit, but not the other way around. If a 250 VAC fuse is used on a device that uses 120 VAC, there should be no problem.