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. 203-3952
Mfr. Part No.5SD420
BrandSiemens
HK$236.518
Each (In a Pack of 5)
units
16 A DII 500 V GR E27 - - - - -
RS Stock No. 413-765
Mfr. Part No.2313403
BrandETI
HK$15.264
Each (In a Pack of 5)
units
63 A DIII 500 V ac GG - gL E33 - - - Copper Ceramic
RS Stock No. 417-830
Mfr. Part No.2311403
BrandETI
HK$9.052
Each (In a Pack of 5)
units
6 A DI 500 V ac GG - gL E16 - - - Green Ceramic
RS Stock No. 377-0617
Mfr. Part No.Y216612
BrandMersen
HK$55.41
Each (In a Pack of 5)
units
30 A DII 500 V ac GR E27 50 kA -40°C - - Ceramic
RS Stock No. 395-771
Mfr. Part No.5SA221
BrandSiemens
HK$29.847
Each (In a Pack of 10)
units
4 A DII 500 V ac GG E16 8 kA @ 500 V dc, 50 kA @ 500 V ac -5°C +40°C Brown Ceramic
RS Stock No. 417-846
Mfr. Part No.2311404
BrandETI
HK$7.598
Each (In a Pack of 5)
units
10 A DI 500 V ac GG - gL E16 - - - Red Ceramic
RS Stock No. 421-479
Mfr. Part No.10-005-07/6A
BrandSIBA
HK$32.214
Each (In a Pack of 5)
units
6 A DII 500 V ac GR E27 50 kA - - - Ceramic
RS Stock No. 413-743
Mfr. Part No.2313401
BrandETI
HK$12.834
Each (In a Pack of 5)
units
35 A DIII 500 V ac GG - gL E33 - - - Black Ceramic
RS Stock No. 417-824
Mfr. Part No.2311402
BrandETI
HK$9.662
Each (In a Pack of 5)
units
4 A DI 500 V ac GG - gL E16 - - - Brown Ceramic
RS Stock No. 421-463
Mfr. Part No.10-005-07/4A
BrandSIBA
HK$40.076
Each (In a Pack of 5)
units
4 A DII 500 V ac GR E27 50 kA - - - Ceramic
RS Stock No. 421-457
Mfr. Part No.10-005-07/2A
BrandSIBA
HK$65.498
Each (In a Pack of 5)
units
2 A DII 500 V ac GR E27 50 kA - - - Ceramic
RS Stock No. 377-0443
Mfr. Part No.G222163
BrandMersen
HK$11.386
Each (In a Pack of 5)
units
4 A DII 500 V GG E27 - -40°C - Brown Ceramic
RS Stock No. 377-0263
Mfr. Part No.B217742
BrandMersen
HK$10.916
Each (In a Pack of 5)
units
20 A D02 400 V ac GG - 100 kA - - Blue Ceramic
RS Stock No. 202-7226
Mfr. Part No.5SD470
BrandSiemens
HK$104.634
Each (In a Pack of 5)
units
63 A DIII 500 V GR E33 - - - - -
RS Stock No. 181-8716
Mfr. Part No.25D27
HK$37.86
Each
units
25 A DII 500 V ac GG E27 50 kA @ 500 V ac - - Yellow -
RS Stock No. 622-1067
Mfr. Part No.5SE2316
BrandSiemens
HK$16.491
Each (In a Pack of 10)
units
16 A D01 400 V ac GG - 8 kA @ 250 V dc, 50 kA @ 400 V ac -5°C +40°C Grey Ceramic
RS Stock No. 377-0465
Mfr. Part No.K200707
BrandMersen
HK$8.186
Each (In a Pack of 5)
units
10 A DII 500 V GG E27 - -40°C - Red Ceramic
RS Stock No. 181-8813
Mfr. Part No.50NZ02
HK$72.42
Each
units
50 A D02 400 V ac GG E18 50 kA @ 400 V ac - - White -
RS Stock No. 416-001
Mfr. Part No.2212003
BrandETI
HK$9.368
Each (In a Pack of 5)
units
35 A D02 400 V ac GG E18 8 kA @ 250 V dc, 50 kA @ 400 V ac - - Black Ceramic
RS Stock No. 377-0487
Mfr. Part No.A211508
BrandMersen
HK$9.814
Each (In a Pack of 5)
units
20 A DII 500 V GG E27 - -40°C - Blue Ceramic