Eaton Bussmann anti-surge ceramic cartridge fuses are designed to prevent damage to electrical equipment. These fuses allow an electric current to flow through until the current goes over the fuse's rating then it will blow and stop the flow of electricity. This range of ceramic cartridge fuses is 5 x 20mm with a T speed rating.

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, which means that ceramic fuses can be used in circuits that have a higher current rating. They are perfect for protecting against overheating.

What size is it?

5x20 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 5x20 mm fuse holder.

What Speed is it?

This particular fuse is “T” speed rated which means it is a slow acting fuse, sometimes referred to as anti-surge. It is able to tolerate higher levels for a short period, without shorting. Therefore, if a sudden change occurs, this fuse will not blow immediately. They are suitable for applications where a sudden flow of high current is required.

What voltage is it?

These cartridge fuses are available with 0.5 to 12 Amp current ratings for applications where the system voltage rating is 250 Volts AC.

What is Breaking Capacity?

Breaking capacity is the level of current that the fuse can safely handle without exploding or breaking. The breaking capacity of your fuse should be greater than the fault current of your electronic circuit.

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

What is an overcurrent?

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

This product is part of the S505 series and features a current rating of 3.15 A with a rated AC voltage of 250 V. It is designed with a typical pre-arcing voltage drop of 102.5 mV and offers a cold resistance of 0.0305 Ω. Its ceramic tube construction provides high breaking capacity, ensuring reliable performance in various electrical applications.

• Time-delay functionality protects against transient surges
• High breaking capacity enhances safety in circuits
• RoHS compliant ensures reduced environmental impact
• Ceramic construction improves thermal stability
• Compatible with various devices for versatile applications

• Ideal for LED and general lighting systems
• Suitable for LED/LCD televisions and monitors
• Used in printers and peripherals for protection
• Effective in household appliances and white goods
• Reliable for power supplies and test equipment

The operating temperature range is -55 °C to +125 °C.

Eaton formerly known as Bussmann