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. 377-0645
Mfr. Part No.Q217640
BrandMersen
SGD7.884
Each (In a Pack of 5)
units
50A DIII 500V ac gR E33 50 kA -40°C - - Ceramic
RS Stock No. 421-508
Mfr. Part No.10-005-07/25A
BrandSIBA
SGD5.498
Each (In a Pack of 5)
units
25A DII 500V ac gR E27 50 kA - - - Ceramic
RS Stock No. 377-0392
Mfr. Part No.J214575
BrandMersen
SGD1.544
Each (In a Pack of 5)
units
16A DI 500V gG E16 - -40°C - Grey Ceramic
RS Stock No. 899-0936
Mfr. Part No.25D27FB
BrandAltech
SGD3.53
Each (In a Pack of 10)
units
25A DII 500V ac - E27 - - - Yellow Glass
RS Stock No. 181-8894
Mfr. Part No.10D27Q
SGD5.29
Each
units
10A DII 500V ac gG E27 50 kA @ 500 V ac - - Red -
RS Stock No. 377-0386
Mfr. Part No.B214062
BrandMersen
SGD1.544
Each (In a Pack of 5)
units
10A DI 500V gG E16 - -40°C - Red Ceramic
RS Stock No. 899-3420
Mfr. Part No.2D16SB
BrandAltech
SGD4.14
Each (In a Pack of 10)
units
2A DI 500V ac gG E16 - - - Pink Glass
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