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. 898-3388
Mfr. Part No.16D16SC
BrandAltech
TWD240.40
Each (In a Pack of 25)
units
16 A DI 500 V ac GR E16 - - - Grey Glass
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. 898-1288
Mfr. Part No.10D27FB
BrandAltech
TWD77.40
Each (In a Pack of 10)
units
- DII - - E27 - - - - -
RS Stock No. 181-8902
Mfr. Part No.16D27Q
TWD124.00
Each
units
16 A DII 500 V ac GG E27 50 kA @ 500 V ac - - Grey -
RS Stock No. 377-0487
Mfr. Part No.A211508
BrandMersen
TWD35.80
Each (In a Pack of 5)
units
20 A DII 500 V GG E27 - -40°C - Blue 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