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. 377-0493
Mfr. Part No.X212540
BrandMersen
£0.698
Each (In a Pack of 5)
Units
25A DII 500V gG E27 - -40°C - Yellow Ceramic
RS Stock No. 377-0471
Mfr. Part No.K201765
BrandMersen
£0.582
Each (In a Pack of 5)
Units
16A DII 500V gG E27 - -40°C - Grey Ceramic
RS Stock No. 377-0459
Mfr. Part No.B222917
BrandMersen
£0.928
Each (In a Pack of 5)
Units
6A DII 500V gG - gL E27 - -40°C - Green Ceramic
RS Stock No. 377-0279
Mfr. Part No.W213160
BrandMersen
£0.888
Each (In a Pack of 5)
Units
25A D02 400V ac gG - 50 kA @ 500 V ac -40°C - Yellow Ceramic
RS Stock No. 377-0550
Mfr. Part No.E214065
BrandMersen
£2.988
Each (In a Pack of 5)
Units
6A DII 500V ac gR E27 50 kA -40°C - - Ceramic
RS Stock No. 377-0516
Mfr. Part No.K214576
BrandMersen
£1.108
Each (In a Pack of 5)
Units
50A DIII 500V gG E33 - -40°C - White Ceramic
RS Stock No. 377-0285
Mfr. Part No.R219826
BrandMersen
£0.966
Each (In a Pack of 5)
Units
35A D02 400V ac gG - 50 kA @ 500 V ac -40°C - Black Ceramic
RS Stock No. 377-0500
Mfr. Part No.C214063
BrandMersen
£1.144
Each (In a Pack of 5)
Units
35A DIII 500V gG E33 - -40°C - Black Ceramic
RS Stock No. 377-0342
Mfr. Part No.W212539
BrandMersen
£0.882
Each (In a Pack of 5)
Units
2A DI 500V gG E16 - -40°C - Pink Ceramic
RS Stock No. 377-0522
Mfr. Part No.R215088
BrandMersen
£1.058
Each (In a Pack of 5)
Units
63A DIII 500V gG E33 - -40°C - Copper Ceramic
RS Stock No. 377-0257
Mfr. Part No.R223023
BrandMersen
£0.734
Each (In a Pack of 5)
Units
16A D01 400V ac gG - 100 kA -40°C - Grey Ceramic
RS Stock No. 377-0465
Mfr. Part No.K200707
BrandMersen
£0.672
Each (In a Pack of 5)
Units
10A DII 500V gG E27 - -40°C - Red Ceramic
RS Stock No. 377-0370
Mfr. Part No.C213557
BrandMersen
£0.796
Each (In a Pack of 5)
Units
6A DI 500V gG E16 - -40°C - Green Ceramic
RS Stock No. 377-0392
Mfr. Part No.J214575
BrandMersen
£0.796
Each (In a Pack of 5)
Units
16A DI 500V gG E16 - -40°C - Grey Ceramic
RS Stock No. 377-0241
Mfr. Part No.W211090
BrandMersen
£0.734
Each (In a Pack of 5)
Units
10A D01 400V ac gG - 50 kA -40°C - Red Ceramic
RS Stock No. 377-0588
Mfr. Part No.T215090
BrandMersen
£3.764
Each (In a Pack of 5)
Units
16A DII 500V ac gR E27 50 kA -40°C - - Ceramic
RS Stock No. 377-0409
Mfr. Part No.Q215087
BrandMersen
£0.796
Each (In a Pack of 5)
Units
20A DI 500V gG E16 - -40°C - Blue Ceramic
RS Stock No. 377-0235
Mfr. Part No.B215695
BrandMersen
£0.844
Each (In a Pack of 5)
Units
6A D01 400V ac gG - 100 kA - - Green Ceramic
RS Stock No. 377-0487
Mfr. Part No.A211508
BrandMersen
£0.798
Each (In a Pack of 5)
Units
20A DII 500V gG E27 - -40°C - Blue Ceramic
RS Stock No. 377-0421
Mfr. Part No.Q215593
BrandMersen
£0.796
Each (In a Pack of 5)
Units
25A DI 500V gG E16 - -40°C - Yellow Ceramic