RS PRO, 1A Glass Cartridge Fuse, 5 x 20mm, Speed T

Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): TW
Product Details

Glass cartridge fuses are ideal for providing protection to devices or internal circuits from short circuits and overcurrent. They are deliberately weaker components which, when too much current is drawn, will blow. Once the fuse has blown it will need replacing in order to make the circuit complete and allow the flow of current.

Glass cartridge
5 x 20 mm cartridge size
T Speed Rating
Low Breaking Capacity

Typical applications:
Cartridge fuses are a relatively cheap way of protecting electrical equipment from short circuits and overcurrent and can be used to protect electrical appliances such as motors air-conditions, refrigerator, pumps etc. They can be found in the following areas:

Additional Information:

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).

RS PRO Glass Cartridge Fuse


Current rating: 1 A
Voltage rating: 250 V ac
Cylindrical in shape



Attribute Value
Current Rating 1 A
Fuse Size 5 x 20mm
Fuse Speed T
Voltage Rating 250 V ac
Body Material Glass
Available to back order for despatch 26/02/2020
Price Each (In a Pack of 10)
£ 0.115
(exc. VAT)
£ 0.138
(inc. VAT)
Per unit
Per Pack*
10 - 90
100 - 240
250 - 490
500 - 990
1000 +
*price indicative
Related Products
A range of glass fuses are ideal for ...
A range of glass fuses are ideal for protection for electrical circuits and consumer electronic. Glass Body 5 x 20 mm Fast acting, low breaking capacity.
The Schurter D1 TD cartridge fuse has a ...
The Schurter D1 TD cartridge fuse has a glass cylindrical body with 220VAC 1.25A rating. It has nickel-plated copper alloy endcaps on both sides and protected terminals. Super time-delayed 5 x 20 mm fuses.Low breaking capacity.Glass tube, protected terminals.
Schurter FSF fuses are a dependable primary protection ...
Schurter FSF fuses are a dependable primary protection device for use in a wide range of applications. Used in conjunction with Schurter fuse holders these fuses can be used in different applications such as board mount and panel mounted protection.Why choose a glass fuse?Glass and ceramic fuses have many similar ...
The 215 series is 5x20, Ceramic body, Time-Lag ...
The 215 series is 5x20, Ceramic body, Time-Lag type Cartridge fuse. With the extension into higher current ratings beyond existing 12A, from 15A up to 25A in cartridge version, in particular for 20A and 25A, it offers designers better flexibility in circuit protection design for high current applications. The 215 ...