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. 377-0386
Mfr. Part No.B214062
BrandMersen
£0.826
Each (In a Pack of 5)
Units
10A DI 500V gG E16 - -40°C - Red Ceramic
RS Stock No. 395-771
Mfr. Part No.5SA221
BrandSiemens
£3.325
Each (In a Pack of 10)
Units
4A DII 500V ac gG E16 50 kA @ 500 V ac, 8 kA @ 500 V dc -5°C +40°C Brown Ceramic
RS Stock No. 847-0983
Mfr. Part No.5SD440
BrandSiemens
£6.58
Each
Units
25A DII 500V ac/dc gR E27 - -5°C +40°C - -
RS Stock No. 622-1146
Mfr. Part No.5SE2280
BrandSiemens
£9.333
Each (In a Pack of 10)
Units
80A D03 400V ac gG - 50 kA @ 400 V ac, 8 kA @ 250 V dc -5°C +40°C Blue Ceramic
RS Stock No. 397-604
Mfr. Part No.5SA231
BrandSiemens
£3.325
Each (In a Pack of 10)
Units
6A DII 500V ac gG E16 50 kA @ 500 V ac, 8 kA @ 500 V dc -5°C +40°C Green Ceramic
RS Stock No. 377-0213
Mfr. Part No.T214676
BrandMersen
£0.78
Each (In a Pack of 5)
Units
2A D01 400V ac gG - 50 kA - - Pink Ceramic
RS Stock No. 421-413
Mfr. Part No.10-028-07/25A
BrandSIBA
£4.182
Each (In a Pack of 5)
Units
25A D02 440V ac gR E18 - - - - Ceramic
RS Stock No. 421-457
Mfr. Part No.10-005-07/2A
BrandSIBA
£5.328
Each (In a Pack of 5)
Units
2A DII 500V ac gR E27 50 kA - - - Ceramic
RS Stock No. 421-429
Mfr. Part No.10-028-07/35A
BrandSIBA
£4.386
Each (In a Pack of 5)
Units
35A D02 440V ac gR E18 - - - - Ceramic
RS Stock No. 421-520
Mfr. Part No.10-007-07/35A
BrandSIBA
£3.714
Each (In a Pack of 5)
Units
35A DIII 500V ac gR E33 50 kA - - - Ceramic
RS Stock No. 377-0314
Mfr. Part No.C201873
BrandMersen
£0.988
Each (In a Pack of 5)
Units
63A D02 400V ac gG - 50 kA @ 500 V ac - - Copper Ceramic
RS Stock No. 377-0601
Mfr. Part No.B216109
BrandMersen
£3.282
Each (In a Pack of 5)
Units
25A DII 500V ac gR E27 50 kA - - - Ceramic
RS Stock No. 900-1576
Mfr. Part No.6D27SB
BrandAltech
£1.754
Each (In a Pack of 10)
Units
6A DII 500V ac gG E27 - - - Green Glass
RS Stock No. 377-0667
Mfr. Part No.H222923
BrandMersen
£5.754
Each (In a Pack of 5)
Units
20A D02 440V ac gR E18 - -40°C - - Ceramic
RS Stock No. 377-0364
Mfr. Part No.G213055
BrandMersen
£0.826
Each (In a Pack of 5)
Units
4A DI 500V gG E16 - -40°C - Brown Ceramic
RS Stock No. 421-536
Mfr. Part No.10-007-07/50A
BrandSIBA
£3.912
Each (In a Pack of 5)
Units
50A DIII 500V ac gR E33 50 kA - - - Ceramic
RS Stock No. 377-0544
Mfr. Part No.K213058
BrandMersen
£2.918
Each (In a Pack of 5)
Units
4A DII 500V ac gR E27 50 kA -40°C - - Ceramic
RS Stock No. 622-1152
Mfr. Part No.5SE2300
BrandSiemens
£4.667
Each (In a Pack of 10)
Units
100A D03 400V ac gG - 50 kA @ 400 V ac, 8 kA @ 250 V dc -5°C +40°C Red Ceramic
RS Stock No. 377-0566
Mfr. Part No.M214578
BrandMersen
£3.286
Each (In a Pack of 5)
Units
10A DII 500V ac gR E27 50 kA -40°C - - Ceramic
RS Stock No. 622-1095
Mfr. Part No.5SE2332
BrandSiemens
£1.683
Each (In a Pack of 10)
Units
32A D02 400V ac gG - 50 kA @ 400 V ac, 8 kA @ 250 V dc -5°C +40°C Black Ceramic