Bottle Fuses

Bottle fuses are a type of fuse with differently sized ends. They are designed to ensure that the wrong fuse is never inserted into the circuit, as their larger end is sized according to the adaptor screw holes.

Fuses are designed to protect a circuit against overcurrent or other faults. When overcurrent occurs, the metal strip in the fuse will melt, causing the circuit to break and preventing further damage.

How do bottle fuses work?

Bottle fuses are inserted into the circuit in a similar way to normal fuses, by connecting their two ends to the adjacent parts, or by using a bottle fuse holder However, unlike regular fuses, when a bottle fuse blows, the colour indicator located at the head of the fuse pops out, to let the user know that there is a problem with a circuit. The fuse will then need to be changed.

Types of bottle fuses

Bottle fuses, as the name suggests, feature a bottle shaped body with a larger tip and a smaller one. They vary in exact shape and come in different sizes and voltage ranges depending on the specific application.


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Description Price Current Rating Bottle Fuse Size Voltage Rating Application Category Thread Size Breaking Capacity at Maximum Voltage Rating Minimum Operating Temperature Maximum Operating Temperature Gauge/Cap Colour Body Material
RS Stock No. 421-508
Mfr. Part No.10-005-07/25A
BrandSIBA
£2.834
Each (In a Pack of 5)
Units
25A DII 500V ac gR E27 50 kA - - - Ceramic
RS Stock No. 421-558
Mfr. Part No.10-002-04/1A
BrandSIBA
£2.894
Each (In a Pack of 5)
Units
1A DI 500V ac gG - gL E16 50 kA - - - Ceramic
RS Stock No. 421-542
Mfr. Part No.10-007-07/63A
BrandSIBA
£3.65
Each (In a Pack of 5)
Units
63A DIII 500V ac gR E33 50 kA - - Grey Ceramic
RS Stock No. 421-485
Mfr. Part No.10-005-07/10A
BrandSIBA
£2.568
Each (In a Pack of 5)
Units
10A DII 500V ac gR E27 50 kA - - Grey Ceramic
RS Stock No. 421-441
Mfr. Part No.10-028-07/63A
BrandSIBA
£4.69
Each (In a Pack of 5)
Units
63A D02 440V ac gR E18 - - - - Ceramic
RS Stock No. 422-551
Mfr. Part No.10-005-07/20A
BrandSIBA
£3.018
Each (In a Pack of 5)
Units
20A DII 500V ac gR E27 50 kA - - Grey Ceramic
RS Stock No. 421-491
Mfr. Part No.10-005-07/16A
BrandSIBA
£2.968
Each (In a Pack of 5)
Units
16A DII 500V ac gR E27 50 kA - - - Ceramic
RS Stock No. 421-514
Mfr. Part No.10-005-07/30A
BrandSIBA
£3.13
Each (In a Pack of 5)
Units
30A DII 500V ac gR E27 50 kA - - - Ceramic
RS Stock No. 421-435
Mfr. Part No.10-028-07/50A
BrandSIBA
£4.732
Each (In a Pack of 5)
Units
50A D02 440V ac gR E18 - - - - Ceramic
RS Stock No. 421-413
Mfr. Part No.10-028-07/25A
BrandSIBA
£4.10
Each (In a Pack of 5)
Units
25A D02 440V ac gR E18 - - - - Ceramic
RS Stock No. 421-429
Mfr. Part No.10-028-07/35A
BrandSIBA
£4.30
Each (In a Pack of 5)
Units
35A D02 440V ac gR E18 - - - - Ceramic
RS Stock No. 421-457
Mfr. Part No.10-005-07/2A
BrandSIBA
£3.07
Each (In a Pack of 5)
Units
2A DII 500V ac gR E27 50 kA - - - Ceramic
RS Stock No. 421-520
Mfr. Part No.10-007-07/35A
BrandSIBA
£3.538
Each (In a Pack of 5)
Units
35A DIII 500V ac gR E33 50 kA - - - Ceramic
RS Stock No. 421-536
Mfr. Part No.10-007-07/50A
BrandSIBA
£3.836
Each (In a Pack of 5)
Units
50A DIII 500V ac gR E33 50 kA - - - Ceramic
RS Stock No. 421-463
Mfr. Part No.10-005-07/4A
BrandSIBA
£3.196
Each (In a Pack of 5)
Units
4A DII 500V ac gR E27 50 kA - - - Ceramic
RS Stock No. 421-407
Mfr. Part No.10-028-07/20A
BrandSIBA
£3.228
Each (In a Pack of 5)
Units
20A D02 440V ac gR E18 - - - - Ceramic
RS Stock No. 421-479
Mfr. Part No.10-005-07/6A
BrandSIBA
£2.568
Each (In a Pack of 5)
Units
6A DII 500V ac gR E27 50 kA - - - Ceramic