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.

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กำลังดูสินค้า 1 - 20 รายการจาก 27 รายการ / Viewing 1 - 20 of 27 products
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รายละเอียดสินค้า / Description ราคา / 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. 176-9148
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.P82 80 05100
Brand :Limitor
THB180.83
Each
Units
+80°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm
RS Stock No. 616-9969
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.Q82 A 125 05 100
Brand :Limitor
THB237.60
Each
Units
+125°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm
RS Stock No. 176-9182
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.P82 110 05100
Brand :Limitor
THB208.30
Each
Units
+110°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm
RS Stock No. 176-9384
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SM 126 A0
Brand :Limitor
THB32.778
Each: (In a Pack of 5)
Units
+131°C +96°C 2 A 250V ac Axial - 2.5mm 9mm - - 0.6mm 38mm
RS Stock No. 797-6055
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SF 129 R
Brand :Limitor
THB34.185
Each: (In a Pack of 10)
Units
+133°C +118°C 15 A 250V ac Axial - 4mm 8.5mm - - 1mm 18.5mm
RS Stock No. 176-9154
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.P82 90 05100
Brand :Limitor
THB194.11
Each
Units
+90°C - 2.5 A 250V ac Radial - - 8mm 17.5mm 4mm 0.51mm 100mm
RS Stock No. 176-9283
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SF129E
Brand :Limitor
THB26.592
Each: (In a Pack of 5)
Units
+133°C +118°C 10 A 250V ac Axial - 4.2mm 11mm - - 1mm 55mm
RS Stock No. 124-5057
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.A1-5AF
Brand :Limitor
THB36.35
Each: (In a Pack of 5)
Units
+102°C +63°C 5 A 250V ac Radial A-5A-F - 8mm 6.6mm 2.6mm 0.6mm -
RS Stock No. 797-6058
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SF 150 R
Brand :Limitor
THB34.185
Each: (In a Pack of 10)
Units
+152°C +137°C 15 A 250V ac Axial - 4mm 8.5mm - - 1mm 18.5mm
RS Stock No. 797-6052
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SF 167 R
Brand :Limitor
THB29.574
Each: (In a Pack of 10)
Units
+167°C +153°C 15 A 250V ac Axial - 4mm 8.5mm - - 1mm 18.5mm
RS Stock No. 797-6042
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SF 119 R
Brand :Limitor
THB27.056
Each: (In a Pack of 10)
Units
+121°C +106°C 15 A 250V ac Axial - 4mm 8.5mm - - 1mm 18.5mm
RS Stock No. 124-5061
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.A4-5AF
Brand :Limitor
THB38.288
Each: (In a Pack of 5)
Units
+130°C +90°C 5 A 250V ac Radial A-5A-F - 8mm 6.6mm 2.6mm 0.6mm -
RS Stock No. 176-9378
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SM 110 A0
Brand :Limitor
THB38.472
Each: (In a Pack of 5)
Units
+115°C +80°C 2 A 250V ac Axial - 2.5mm 9mm - - 0.6mm 38mm
RS Stock No. 797-6061
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SF 139 R
Brand :Limitor
THB32.272
Each: (In a Pack of 10)
Units
+142°C +127°C 15 A 250V ac Axial - 4mm 8.5mm - - 1mm 18.5mm
RS Stock No. 797-6064
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SF 094 R
Brand :Limitor
THB35.654
Each: (In a Pack of 10)
Units
+99°C +84°C 15 A 250V ac Axial - 4mm 8.5mm - - 1mm 18.5mm
RS Stock No. 797-6049
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SF 090 R
Brand :Limitor
THB34.185
Each: (In a Pack of 10)
Units
+94°C +79°C 15 A 250V ac Axial - 4mm 8.5mm - - 1mm 18.5mm
RS Stock No. 124-5059
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.A2-5AF
Brand :Limitor
THB37.664
Each: (In a Pack of 5)
Units
+115°C +75°C 5 A 250V ac Radial A-5A-F - 8mm 6.6mm 2.6mm 0.6mm -
RS Stock No. 116-114
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SM 092 A0 2A
Brand :Limitor
THB40.744
Each: (In a Pack of 5)
Units
+97°C +62°C 2 A 250V ac Axial - 2.5mm 9mm - - 0.6mm 38mm
RS Stock No. 797-6046
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SF 070 R
Brand :Limitor
THB34.185
Each: (In a Pack of 10)
Units
+73°C +58°C 15 A 250V ac Axial - 4mm 8.5mm - - 1mm 18.5mm
RS Stock No. 124-5058
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.A2-3AF
Brand :Limitor
THB30.398
Each: (In a Pack of 5)
Units
+115°C +78°C 3 A 250V ac Radial A-3A-F - 6.3mm 6.2mm 2.5mm 0.6mm -