Thermal Fuses

What are 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.

...
Read more Read less

Filters

Viewing 1 - 18 of 18 products
Results per page
Description Price Functioning Temperature Holding Temperature Maximum Current Voltage Rating Lead Orientation Series Body Diameter Body Height Body Length Body Width Wire Diameter Wire Length
RS Stock No. 712-7284
Mfr. Part No.EYP2BN109
BrandPanasonic
$1.014
Each (In a Pack of 10)
units
+114°C +90°C 5 A 250 V ac Axial - 3mm 9mm 9mm - 0.6mm 38mm
RS Stock No. 712-7339
Mfr. Part No.EYP2BH115
BrandPanasonic
$1.057
Each (In a Pack of 10)
units
+115°C +90°C 3.5 A 250 V ac Radial - - 4mm 5mm 2.2mm 0.53mm 55mm
RS Stock No. 712-7348
Mfr. Part No.EYP2BH134
BrandPanasonic
$0.693
Each (In a Pack of 10)
units
+134°C +95°C 3.5 A 250 V ac Radial - - 4mm 5mm 2.2mm 0.53mm 55mm
RS Stock No. 712-7307
Mfr. Part No.EYP1BF115
BrandPanasonic
$0.604
Each (In a Pack of 10)
units
+115°C +90°C 4 A 250 V ac Axial - 2.2mm 6mm 6mm - 0.53mm 38mm
RS Stock No. 712-7335
Mfr. Part No.EYP2BH101
BrandPanasonic
$1.574
Each (In a Pack of 10)
units
+102°C +75°C 3.5 A 250 V ac Radial - - 4mm 5mm 2.2mm 0.53mm 55mm
RS Stock No. 712-7341
Mfr. Part No.EYP2BH138
BrandPanasonic
$1.553
Each (In a Pack of 10)
units
+139°C +105°C 3.5 A 250 V ac Radial - - 4mm 5mm 2.2mm 0.53mm 55mm
RS Stock No. 712-7326
Mfr. Part No.EYP05BE115
BrandPanasonic
$0.847
Each (In a Pack of 10)
units
+115°C +95°C 3 A 250 V ac Axial - 1.8mm 5mm - - 0.53mm 38mm
RS Stock No. 712-7351
Mfr. Part No.EYP2MP098AU
BrandPanasonic
$1.215
Each (In a Pack of 10)
units
+98°C +65°C 2 A 32 V dc Axial - - 0.64mm 4.2mm 2.7mm 2.3mm 7.9mm
RS Stock No. 712-7354
Mfr. Part No.EYP2MP092AU
BrandPanasonic
$0.467
Each (In a Pack of 10)
units
+92°C +60°C 2 A 32 V dc Axial - - 0.64mm 4.2mm 2.7mm 2.3mm 7.9mm
RS Stock No. 712-7297
Mfr. Part No.EYP2BN127
BrandPanasonic
$0.508
Each (In a Pack of 10)
units
+134°C +100°C 4 A 250 V ac Axial - 3mm 9mm 9mm - 0.6mm 38mm
RS Stock No. 712-7290
Mfr. Part No.EYP2BN134
BrandPanasonic
$0.37
Each (In a Pack of 10)
units
+139°C +110°C 6 A 250 V ac Axial - 3mm 9mm 9mm - 0.6mm 38mm
RS Stock No. 712-7304
Mfr. Part No.EYP1BF101
BrandPanasonic
$0.404
Each (In a Pack of 10)
units
+102°C +75°C 1 A 250 V ac Axial - 2.2mm 6mm 6mm - 0.53mm 38mm
RS Stock No. 712-7301
Mfr. Part No.EYP1BF134
BrandPanasonic
$0.955
Each (In a Pack of 10)
units
+134°C +105°C 4 A 250 V ac Axial - 2.2mm 6mm 6mm - 0.53mm 38mm
RS Stock No. 712-7294
Mfr. Part No.EYP2BN143
BrandPanasonic
$0.525
Each (In a Pack of 10)
units
+145°C +120°C 6 A 250 V ac Axial - 3mm 9mm - - 0.6mm 38mm
RS Stock No. 712-7323
Mfr. Part No.EYP05BE138
BrandPanasonic
$0.441
Each (In a Pack of 10)
units
+139°C +115°C 4 A 250 V ac Axial - 1.8mm 5mm 5mm - 0.53mm 38mm
RS Stock No. 712-7288
Mfr. Part No.EYP2BN110
BrandPanasonic
$0.778
Each (In a Pack of 10)
units
+115°C +90°C 5 A 250 V ac Axial - 3mm 9mm 9mm - 0.6mm 38mm
RS Stock No. 712-7332
Mfr. Part No.EYP05BE145
BrandPanasonic
$0.635
Each (In a Pack of 10)
units
+145°C +125°C 5 A 250 V ac Axial - 1.8mm 5mm 5mm - 0.53mm 38mm
RS Stock No. 712-7310
Mfr. Part No.EYP1BF138
BrandPanasonic
$0.718
Each (In a Pack of 10)
units
+139°C +110°C 5 A 250 V ac Axial - 2.2mm 6mm 6mm - 0.53mm 38mm