They act only ones - right then, when it´s really necessary...

With thermal fuses you´ll make a big step towards a higher safety of your device.
This is an archive article published 03/25/2015. Some information may no longer be up to date and in line with the current state. Please contact us in case of interest.

It´s surely not necessary to remind that any device can fail. Failure of a component, overload of a component (underestimated sizing), external influence and many other reasons are daily causing failures of devices. If the result of a malfunction is only an intermediate shutdown, it´s let´s say a better case. But if a device malfunction could cause further damage or even fire, it´s surely worth to make everything possible to prevent it.

A typical component used as a complementary - independent protection from overheating is a thermal fuse. It is a cheap but very useful component, which opens (disconnects) a circuit after exceeding certain temperature. It is a “one shot” component, i.e. after its activation it remains open and the fused circuit is disconnected (the fuse must be exchanged). It´s suitable to choose such fusing temperature of the fuse, as we consider to be really faulty, which otherwise can´t occur in an ordinary operation. Production processes enable to produce thermal fuses in a wide range of temperatures and so fuses Microtemp from company Thermodisc, which we keep in stock, are available in a range of 72-257°C (opening temperature). It´s a really wide range enabling to use a fuse for example for fusing of other component (for example a thermal fuse thermally joined with a transistor heatsink) but also for guarding an air temperature inside a device. These fuses operate on a principle of melting a small plastic pellet inside a fuse, what will cause release of a spring and a consequent disconnection of contacts.

A substantial advantage of thermal fuses Thermodisc is a maximum current up to 10-25A/250VAC depending on a type. On stock we keep the G4 series with a max. current of 10A/250VAC. Small dimensions enable to use a component similarly like any ordinary component. It´s only necessary to be careful at assembling (overheating) especially at low-temperature types.
Details regarding a correct assembly as well as an overview and tips for a correct use of thermal fuses can be find in the Thermodisc application guide. Teplotné poistky sú dostupné aj v iných púzdrach, prípadne aj s nožovými kontaktmi (Fast-on). Thermal fuses are also available in other packages, or also with tabs (Fast-in). Finally, we can mention, that to reach the highest protection level in critical application, it´s ideal to incorporate several types with a slightly different fusing temperature in series.

On stock we keep thermal fuses in a wide thermal range 72-240°C. In case of interest in other types, please contact us at info@soselectronic.com.

They act only ones - right then, when it´s really necessary...

Advantages/ Features:

  • thermal fuses with a high power handling capability
  • important component increasing safety of devices
  • 10A/250VAC (series G4) … 25A/250VAC
  • available with fusing temperatures 72-257°C
  • one-shot (non-resettable) function
  • acceptable price

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770.072 ESKA  
770.072

Thermal Fuse 72°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40099
Manufacturer: ESKA
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SF76R0 SCHOTT  
SF76R0

Thermal Fuse 77°C 250VAC 15A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40100
Manufacturer: SCHOTT
in stock 12 pcs
5 pcs+
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770.093 ESKA  
770.093

Thermal Fuse 93°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40103
Manufacturer: ESKA
in stock 4 pcs
5 pcs+
8 pcs+
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600 pcs+
0,6610 €
0,6380 €
0,5860 €
0,5370 €
0,4950 €
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770.098 ESKA  
770.098

Thermal Fuse 98°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40104
Manufacturer: ESKA
in stock 18 pcs
4 pcs+
8 pcs+
20 pcs+
100 pcs+
700 pcs+
0,6380 €
0,6170 €
0,5660 €
0,5190 €
0,4640 €
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770.104 ESKA  
770.104

Thermal Fuse 104°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40105
Manufacturer: ESKA
in stock 21 pcs
4 pcs+
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0,6600 €
0,6380 €
0,5860 €
0,5360 €
0,4940 €
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770.110 ESKA  
770.110

Thermal Fuse 110°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40106
Manufacturer: ESKA
in stock 0 pcs
4 pcs+
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0,6610 €
0,6380 €
0,5860 €
0,5370 €
0,4950 €
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770.117 ESKA  
770.117

Thermal Fuse 117°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40107
Manufacturer: ESKA
in stock 29 pcs
4 pcs+
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0,6050 €
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0,5600 €
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770.121 ESKA  
770.121

Thermal Fuse 121°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40108
Manufacturer: ESKA
in stock 6 pcs
5 pcs+
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200 pcs+
800 pcs+
0,5670 €
0,5480 €
0,5300 €
0,4450 €
0,4140 €
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770.128 ESKA  
770.128

Thermal Fuse 128°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40109
Manufacturer: ESKA
in stock 11 pcs
4 pcs+
8 pcs+
20 pcs+
100 pcs+
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0,6600 €
0,6380 €
0,5860 €
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770.144 ESKA  
770.144

Thermal Fuse 144°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40111
Manufacturer: ESKA
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770.152 ESKA  
770.152

Thermal Fuse 152°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40112
Manufacturer: ESKA
in stock 5 pcs
4 pcs+
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100 pcs+
700 pcs+
0,6290 €
0,6070 €
0,5580 €
0,5110 €
0,4570 €
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770.167 ESKA  
770.167

Thermal Fuse 167°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40113
Manufacturer: ESKA
in stock 36 pcs
4 pcs+
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600 pcs+
0,6600 €
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770.184 ESKA  
770.184

Thermal Fuse 184°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40114
Manufacturer: ESKA
in stock 360 pcs
4 pcs+
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0,6050 €
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SF188R0 SCHOTT  
SF188R0

Thermal Fuse 192°C 250VAC 15A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40115
Manufacturer: SCHOTT
in stock 13 pcs
(04/05/2024: 10 pcs)
5 pcs+
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SF214R0 SCHOTT  
SF214R0

Thermal Fuse 216°C 250VAC 15A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40116
Manufacturer: SCHOTT
in stock 29 pcs
5 pcs+
10 pcs+
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0,4620 €
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0,3340 €
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770.229 ESKA  
770.229

Thermal Fuse 229°C 250VAC 10A D4,0xL14,7mm

Thermal Cutoffs

Ord. No.: 40117
Manufacturer: ESKA
in stock 50 pcs
4 pcs+
8 pcs+
20 pcs+
100 pcs+
600 pcs+
0,6600 €
0,6380 €
0,5860 €
0,5370 €
0,4940 €
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SF240R0 SCHOTT  
SF240R0

Thermal Fuse 240°C 250VAC 15A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40119
Manufacturer: SCHOTT
in stock 27 pcs
5 pcs+
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0,4610 €
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0,3970 €
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0,3330 €
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A1-F AUPO  
A1-F

Thermal Fuse 102°C 250VAC 2A 6,2x6,3x2,5mm Radial

Thermal Cutoffs

Ord. No.: 144318
Manufacturer: AUPO
in stock 5 pcs
5 pcs+
10 pcs+
50 pcs+
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1200 pcs+
0,4050 €
0,3690 €
0,3280 €
0,3040 €
0,2740 €
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A2-F AUPO  
A2-F

Thermal Fuse 115°C 250VAC 2A 6,2x6,3x2,5mm Radial

Thermal Cutoffs

Ord. No.: 128431
Manufacturer: AUPO
in stock 10 pcs
5 pcs+
10 pcs+
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200 pcs+
1200 pcs+
0,4050 €
0,3690 €
0,3280 €
0,3040 €
0,2740 €
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A3-F AUPO  
A3-F

Thermal Fuse 125°C 250VAC 2A 6,2x6,3x2,5mm Radial

Thermal Cutoffs

Ord. No.: 157556
Manufacturer: AUPO
in stock 0 pcs
5 pcs+
10 pcs+
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0,4050 €
0,3690 €
0,3280 €
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0,2740 €
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A4-F AUPO  
A4-F

Thermal Fuse 130°C 250VAC 2A 6,2x6,3x2,5mm Radial

Thermal Cutoffs

Ord. No.: 81455
Manufacturer: AUPO
in stock 50 pcs
5 pcs+
10 pcs+
50 pcs+
200 pcs+
1200 pcs+
0,4050 €
0,3690 €
0,3280 €
0,3040 €
0,2740 €
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A5-F AUPO  
A5-F

Thermal Fuse 135°C 250VAC 2A 6,2x6,3x2,5mm Radial

Thermal Cutoffs

Ord. No.: 157560
Manufacturer: AUPO
in stock 0 pcs
5 pcs+
10 pcs+
50 pcs+
200 pcs+
1000 pcs+
0,4280 €
0,3900 €
0,3470 €
0,3210 €
0,2980 €
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