This range of cylindrical ceramic fuses from Eaton Bussmann is the perfect solution for short-circuit protection of semiconductors such as thyristors, diodes and triacs. Available in a range of current ratings with varying resistance values, these cartridge fuses are reliable and suitable for a variety of applications. Note that for fuses with a current rating greater than 6.3A, using open type fuse holders is recommended to reduce the risk of nuisance tripping at or near full rated current.

Why choose ceramic cartridge fuse?

Ceramic and glass cartridge fuses have similar properties. The capacity of a ceramic cartridge fuse is higher than other fuses such as a glass fuse. This means ceramic fuses can be used in circuits that have a higher current and are perfect for protecting against overheating.

What size is it?

5 mm x 20 mm is a standard cartridge size and it measures approximately 20 mm long by 5 mm in diameter. They are popular in board and panel protection and will fit a compatible 5 x 20 mm fuse holder.

What Speed is it?

This particular fuse is type ''F'' speed-rated which means a fast-acting fuse. These are designed to protect less sensitive components and are also used to protect the cabling from melting or catching fire when an overload appear. Every fast-acting fuse will have the exact speed stated which will be relevant to different overloads.

What voltage is it?

These cartridge fuses are available with 40 mA to 10 Amp current ratings for applications where the system voltage rating is 250 Volts AC.

What is an over-current?

It is a setting where a circuit experiences a current that is higher than the normal operating current.

What is Breaking Capacity?

Breaking capacity is the level of current that the fuse can safely handle without exploding or rupturing. The breaking capacity of your fuse should be greater than the fault current of your electronic circuit. This particular cartridge fuse is HBC (High Breaking Capacity).

What are cartridge fuses used for?

• For the protection of components and equipment from costly damage used by over-current
• To isolate sub-systems from the main system once a fault has appeared

This ceramic tube fuse from the S501 series offers robust electrical performance with a rated voltage of 250V AC and a cold resistance of 0.053Ω. It is engineered for a melting I²t of 3.9 amps, ensuring effective protection in circuits. With a voltage drop of 190mV, it is designed for efficient operation.

• High breaking capacity enhances circuit protection
• Fast-acting response to overloads ensures reliability
• Ceramic body construction withstands high temperatures
• Certified by multiple agencies for quality compliance
• Optional axial leads available for flexible installation

• Used for circuit protection in electrical distribution systems
• Suitable for automation and mechanical systems
• Ideal for industrial equipment and appliances
• Commonly implemented in consumer electronics

Yes, its high breaking capacity allows it to protect against power surges.

Yes, it fits standard 5x20mm fuse holders.

It is advisable to use appropriate enclosures to ensure protection in damp conditions.

No, it is primarily designed for industrial and electrical use.

Eaton formerly known as Bussmann

UL, SEMKO, VDE

Very high breaking capacity
Good mechanical/vibration characteristics

Typical Applications include short-circuit protection of semiconductors such as thyristors, diodes and triacs.
Note that with values of greater than 6.3A the use of open type fuseholders is recommended, to reduce the risk of nuisance tripping at or near full rated current.