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
TWD31.40
Each (In a Pack of 5)
units
25 A DII 500 V GG E27 - -40°C - Yellow Ceramic
RS Stock No. 377-0308
Mfr. Part No.D215191
BrandMersen
TWD50.60
Each (In a Pack of 5)
units
50 A D02 400 V ac GG - 50 kA @ 500 V ac -40°C - White Ceramic
RS Stock No. 377-0263
Mfr. Part No.B217742
BrandMersen
TWD39.80
Each (In a Pack of 5)
units
20 A D02 400 V ac GG - 100 kA - - Blue Ceramic
RS Stock No. 377-0522
Mfr. Part No.R215088
BrandMersen
TWD47.60
Each (In a Pack of 5)
units
63 A DIII 500 V GG E33 - -40°C - Copper Ceramic
RS Stock No. 377-0342
Mfr. Part No.W212539
BrandMersen
TWD39.60
Each (In a Pack of 5)
units
2 A DI 500 V GG E16 - -40°C - Pink Ceramic
RS Stock No. 377-0314
Mfr. Part No.C201873
BrandMersen
TWD46.80
Each (In a Pack of 5)
units
63 A D02 400 V ac GG - 50 kA @ 500 V ac - - Copper Ceramic
RS Stock No. 377-0550
Mfr. Part No.E214065
BrandMersen
TWD134.20
Each (In a Pack of 5)
units
6 A DII 500 V ac GR E27 50 kA -40°C - - Ceramic
RS Stock No. 377-0538
Mfr. Part No.Z212542
BrandMersen
TWD166.80
Each (In a Pack of 5)
units
2 A DII 500 V ac GR E27 50 kA -40°C - - Ceramic
RS Stock No. 377-0320
Mfr. Part No.L216716
BrandMersen
TWD261.40
Each (In a Pack of 5)
units
80 A D03 400 V ac GG - 50 kA -40°C - Silver Ceramic
RS Stock No. 377-0695
Mfr. Part No.R201771
BrandMersen
TWD323.80
Each (In a Pack of 5)
units
20 A D02 440 V ac GR E18 - -40°C - - Ceramic
RS Stock No. 377-0651
Mfr. Part No.Y218153
BrandMersen
TWD189.20
Each (In a Pack of 5)
units
63 A DIII 500 V ac GR E33 50 kA -40°C - - Ceramic
RS Stock No. 377-0279
Mfr. Part No.W213160
BrandMersen
TWD39.80
Each (In a Pack of 5)
units
25 A D02 400 V ac GG - 50 kA @ 500 V ac -40°C - Yellow Ceramic
RS Stock No. 377-0409
Mfr. Part No.Q215087
BrandMersen
TWD35.80
Each (In a Pack of 5)
units
20 A DI 500 V GG E16 - -40°C - Blue Ceramic
RS Stock No. 377-0443
Mfr. Part No.G222163
BrandMersen
TWD41.60
Each (In a Pack of 5)
units
4 A DII 500 V GG E27 - -40°C - Brown Ceramic
RS Stock No. 377-0471
Mfr. Part No.K201765
BrandMersen
TWD26.20
Each (In a Pack of 5)
units
16 A DII 500 V GG E27 - -40°C - Grey Ceramic
RS Stock No. 377-0459
Mfr. Part No.B222917
BrandMersen
TWD42.00
Each (In a Pack of 5)
units
6 A DII 500 V GG - gL E27 - -40°C - Green Ceramic
RS Stock No. 377-0364
Mfr. Part No.G213055
BrandMersen
TWD37.60
Each (In a Pack of 5)
units
4 A DI 500 V GG E16 - -40°C - Brown Ceramic
RS Stock No. 377-0673
Mfr. Part No.R200713
BrandMersen
TWD198.00
Each (In a Pack of 5)
units
25 A D02 440 V ac GR E18 - -40°C - - Ceramic
RS Stock No. 377-0500
Mfr. Part No.C214063
BrandMersen
TWD51.60
Each (In a Pack of 5)
units
35 A DIII 500 V GG E33 - -40°C - Black Ceramic
RS Stock No. 377-0617
Mfr. Part No.Y216612
BrandMersen
TWD192.00
Each (In a Pack of 5)
units
30 A DII 500 V ac GR E27 50 kA -40°C - - Ceramic