Thermal Fuses

Thermal fuses, also called thermal cutoffs, are a safety device used in electrical circuits to provide protection against appliances overheating. Thermal fuses are normally supplied in an axial or radial package, although some thermal fuses are now available as a chip.

How do thermal fuses work?

Thermal fuses work in a similar way to electrical cartridge fuses; when the conditions exceed a certain limit, the circuit will be broken. For thermal fuses, the limit is based on temperature. Thermal fuses typically contain a small pellet within them or have a thin piece of wire which melts at a certain temperature. When the pellet or piece of wire melts, the circuit breaks. This is called 'blowing out' or 'burning out'.

Single-use thermal fuses and resettable thermal fuses

Most thermal fuses are single-use and non-resettable. Once the pellet or piece or wire has melted, the thermal fuse will need replacing before you can operate your appliance again. Resettable fuses are available but tend to have a higher upfront cost than single-use counterparts. For resettable fuses, when the wax pellet within melts, the circuit is broken. However, as the appliance cools, the wax pellet will cool and solidify. This will complete the circuit again and your appliance can be used.

What are thermal fuses used for?

Thermal fuses are used to protect appliances from overheating and can be found in domestic and industrial applications. They are a safety device that helps to prevent fires. For example, thermal fuses can be found in hairdryers, tumble dryers and coffee machines.

What is the difference between functioning temperature and holding temperature?

All thermal fuses have a holding temperature rating and functioning temperature rating. These are key measurements to consider when choosing the right thermal fuse for your application. The holding temperature, normally measured in Celsius, defines what temperature the fuse can operate at continuously without blowing. This is the limit of the safe temperature range for the fuse. The functioning temperature is the lowest temperature rating (also in Celsius) at which the thermal fuse will blow and the circuit will break.


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Beskrivning Pris Functioning Temperature Holding Temperature Maximum Current Voltage Rating Lead Orientation Series Body Diameter Body Height Body Length Body Width Wire Diameter Wire Length Fuse Type
RS-artikelnummer 797-6061
Tillv. art.nrSF 139 R
VarumärkeLimitor
10,353 kr
Each (In a Pack of 10)
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+142°C +127°C 10 A/15 A 250V ac Axial SF/R 4mm 8.5mm 8.5mm 4mm 1mm 18.5mm Thermal Cutoff
RS-artikelnummer 797-6058
Tillv. art.nrSF 150 R
VarumärkeLimitor
10,563 kr
Each (In a Pack of 10)
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+152°C +137°C 15 A 250V ac Axial SF/R 4mm 8.5mm 8.5mm 4mm 1mm 18.5mm Thermal Cutoff
RS-artikelnummer 797-6030
Tillv. art.nrSF 229 R
VarumärkeLimitor
10,563 kr
Each (In a Pack of 10)
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+229°C +200°C 15 A 250V ac Axial SF/R 4mm 8.5mm 8.5mm 4mm 1mm 18.5mm Thermal Cutoff
RS-artikelnummer 176-9126
Tillv. art.nrP82 60 05100
VarumärkeLimitor
59,93 kr
Each
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+60°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm -
RS-artikelnummer 712-7284
Tillv. art.nrEYP2BN109
VarumärkePanasonic
3,423 kr
Each (In a Pack of 10)
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+114°C +90°C 5 A 250V ac Axial N 3mm 9mm 9mm - 0.6mm 38mm Thermal Cutoff
RS-artikelnummer 111-7300
Tillv. art.nrSTC-183
VarumärkeSelco
18,785 kr
Each (In a Pack of 10)
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+84°C +60°C 10 A 250V ac Axial STC 4mm 10.5mm - - 1.024mm 35mm Thermal Cutoff
RS-artikelnummer 797-6046
Tillv. art.nrSF 070 R
VarumärkeLimitor
10,53 kr
Each (In a Pack of 10)
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+73°C +58°C 15 A 250V ac Axial SF/R 4mm 8.5mm 8.5mm 4mm 1mm 18.5mm Thermal Cutoff
RS-artikelnummer 204-7382
Tillv. art.nrQ82 A 55 05 100
VarumärkeLimitor
49,45 kr
Each
Enheter
+55°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm -
RS-artikelnummer 797-6055
Tillv. art.nrSF 129 R
VarumärkeLimitor
10,563 kr
Each (In a Pack of 10)
Enheter
+133°C +118°C 15 A 250V ac Axial SF/R 4mm 8.5mm 8.5mm 4mm 1mm 18.5mm Thermal Cutoff
RS-artikelnummer 204-7477
Tillv. art.nrQ82 A 130 05 100
VarumärkeLimitor
63,24 kr
Each
Enheter
+130°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm -
RS-artikelnummer 797-6049
Tillv. art.nrSF 090 R
VarumärkeLimitor
10,53 kr
Each (In a Pack of 10)
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+94°C +79°C 15 A 250V ac Axial SF/R 4mm 8.5mm 8.5mm 4mm 1mm 18.5mm Thermal Cutoff
RS-artikelnummer 195-8749
Tillv. art.nrNIS6150MT1TXG
Varumärkeonsemi
3,192 kr
Each (In a Pack of 50)
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+125°C - 1 A 5V - NIS6150 - 0.75mm 3.1mm 3.1mm - - Resettable Thermal Fuse
RS-artikelnummer 124-5060
Tillv. art.nrA4-3AF
VarumärkeLimitor
11,744 kr
Each (In a Pack of 5)
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+130°C +90°C 3 A 250V ac Radial A-3A-F - 6.3mm 6.2mm 2.5mm 0.6mm - Thermal Cutoff
RS-artikelnummer 176-9154
Tillv. art.nrP82 90 05100
VarumärkeLimitor
62,03 kr
Each
Enheter
+90°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm -
RS-artikelnummer 124-5061
Tillv. art.nrA4-5AF
VarumärkeLimitor
12,074 kr
Each (In a Pack of 5)
Enheter
+130°C +90°C 5 A 250V ac Radial A-5A-F - 8mm 6.6mm 2.6mm 0.6mm - Thermal Cutoff
RS-artikelnummer 111-7811
Tillv. art.nrSWTC-421-3535
VarumärkeSelco
18,481 kr
Each (In a Pack of 10)
Enheter
+216°C +178°C 10 A 250V ac Axial SWTC 4mm 10mm - - 1mm 35mm Thermal Cutoff
RS-artikelnummer 195-8751
Tillv. art.nrNIS6150MT2TXG
Varumärkeonsemi
3,192 kr
Each (In a Pack of 50)
Enheter
+125°C - 1 A 5V - NIS6150 - 0.75mm 3.1mm 3.1mm - - Resettable Thermal Fuse
RS-artikelnummer 111-7813
Tillv. art.nrSWTC-464-3535
VarumärkeSelco
19,834 kr
Each (In a Pack of 10)
Enheter
+240°C +193°C 10 A 250V ac Axial SWTC 4mm 10mm - - 1mm 35mm Thermal Cutoff
RS-artikelnummer 204-7398
Tillv. art.nrQ82 A 60 05 100
VarumärkeLimitor
68,43 kr
Each
Enheter
+60°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm -
RS-artikelnummer 176-9160
Tillv. art.nrP82 100 05100
VarumärkeLimitor
56,95 kr
Each
Enheter
+100°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm -