Schurter FST Time-Lag T Fuses Schurter FST series cartridge fuses are a dependable primary protection device for use in a wide range of applications. The glass body of the cartridge allows for quick identification of incidents and thus allows for quick and easy replacements. Schurter time-lag fuses are useful when looking to avoid nuisance tripping. The FST-series fuses feature a low breaking capacity. Features

- IEC Standard fuse.

- Low breaking capacity.

- Fuse size 5mm x 20mm

Applications

Primary protection in equipment

Standards

- IEC 60127-2/3

- UL 60950 / IEC 60950

- UL 248-14

- ITU-T K.20 and K.21

- TIA-968-A

Approvals

VDE, UL

Why choose a glass fuse?
Glass and ceramic fuses have similar properties. However you may choose a glass fuse as it enables you to see the inside of the fuse. Therefore it is easier to determine whether the fuse has blown.

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 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 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 fuse is LBC (Low Breaking Capacity).