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. 421-407
Mfr. Part No.10-028-07/20A
BrandSIBA
HK$47.108
Each (In a Pack of 5)
units
20 A D02 440 V ac GR E18 - - - - Ceramic
RS Stock No. 203-3951
Mfr. Part No.5SD450
BrandSiemens
HK$115.364
Each (In a Pack of 5)
units
35 A DIII 500 V GR E33 - - - - -
New
RS Stock No. 220-8921
Mfr. Part No.5SA2611
BrandSiemens
HK$26.009
Each (In a Pack of 10)
units
16 A NDz 500 V GG - - - - - -
RS Stock No. 377-0594
Mfr. Part No.T215596
BrandMersen
HK$34.332
Each (In a Pack of 5)
units
20 A DII 500 V ac GR E27 50 kA -40°C - - Ceramic
RS Stock No. 421-508
Mfr. Part No.10-005-07/25A
BrandSIBA
HK$35.528
Each (In a Pack of 5)
units
25 A DII 500 V ac GR E27 50 kA - - - Ceramic
RS Stock No. 377-0695
Mfr. Part No.R201771
BrandMersen
HK$87.776
Each (In a Pack of 5)
units
50 A D02 440 V ac GR E18 - -40°C - - Ceramic
RS Stock No. 396-152
Mfr. Part No.5SB211
BrandSiemens
HK$10.054
Each (In a Pack of 5)
units
2 A DII 500 V ac GG E27 8 kA @ 500 V dc, 50 kA @ 500 V ac -5°C +40°C Pink Ceramic
RS Stock No. 202-7216
Mfr. Part No.5SE1350
BrandSiemens
HK$205.179
Each (In a Pack of 10)
units
50 A D02 400 V GR - - - - - -
RS Stock No. 203-3972
Mfr. Part No.5SD460
BrandSiemens
HK$150.94
Each (In a Pack of 5)
units
50 A DIII 500 V GR E33 - - - - -
RS Stock No. 377-0314
Mfr. Part No.C201873
BrandMersen
HK$13.262
Each (In a Pack of 5)
units
63 A D02 400 V ac GG - 50 kA @ 500 V ac - - Copper Ceramic
RS Stock No. 377-0241
Mfr. Part No.W211090
BrandMersen
HK$9.024
Each (In a Pack of 5)
units
10 A D01 400 V ac GG - 50 kA -40°C - Red Ceramic
RS Stock No. 622-1146
Mfr. Part No.5SE2280
BrandSiemens
HK$48.906
Each (In a Pack of 10)
units
80 A D03 400 V ac GG - 8 kA @ 250 V dc, 50 kA @ 400 V ac -5°C +40°C Blue Ceramic
RS Stock No. 377-0623
Mfr. Part No.K217129
BrandMersen
HK$49.544
Each (In a Pack of 5)
units
35 A DIII 500 V ac GR E33 50 kA -40°C - - Ceramic
RS Stock No. 377-0522
Mfr. Part No.R215088
BrandMersen
HK$14.722
Each (In a Pack of 5)
units
63 A DIII 500 V GG E33 - -40°C - Copper Ceramic
RS Stock No. 421-536
Mfr. Part No.10-007-07/50A
BrandSIBA
HK$48.106
Each (In a Pack of 5)
units
50 A DIII 500 V ac GR E33 50 kA - - - Ceramic
RS Stock No. 417-852
Mfr. Part No.2311405
BrandETI
HK$7.506
Each (In a Pack of 5)
units
16 A DI 500 V ac GG - gL E16 - - - Grey Ceramic
RS Stock No. 622-1118
Mfr. Part No.5SE2340
BrandSiemens
HK$14.138
Each (In a Pack of 10)
units
40 A D02 400 V ac GG - 8 kA @ 250 V dc, 50 kA @ 400 V ac -5°C +40°C Black Ceramic
RS Stock No. 421-485
Mfr. Part No.10-005-07/10A
BrandSIBA
HK$32.212
Each (In a Pack of 5)
units
10 A DII 500 V ac GR E27 50 kA - - Grey Ceramic
RS Stock No. 377-0500
Mfr. Part No.C214063
BrandMersen
HK$14.474
Each (In a Pack of 5)
units
35 A DIII 500 V GG E33 - -40°C - Black Ceramic
RS Stock No. 417-874
Mfr. Part No.2311207
BrandETI
HK$6.14
Each (In a Pack of 5)
units
25 A DI 500 V ac GG - gL - - - - Yellow Ceramic