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 25.03.2015. 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

Fuse thermal 72°C 250VAC/10A D4,2xL11mm

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SF76R0 SCHOTT  
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Fuse thermal 77°C 250VAC/15A D4,2xL11mm

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Manufacturer: SCHOTT
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770.093 ESKA  
770.093

Fuse thermal 93°C 250VAC/10A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40103
Manufacturer: ESKA
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770.098 ESKA  
770.098

Fuse thermal 98°C 250VAC/10A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40104
Manufacturer: ESKA
in stock 31 pcs
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770.104 ESKA  
770.104

Fuse thermal 104°C 250VAC/10A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40105
Manufacturer: ESKA
in stock 44 pcs
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770.110 ESKA  
770.110

Fuse thermal 110°C 250VAC/10A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40106
Manufacturer: ESKA
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770.117 ESKA  
770.117

Fuse thermal 117°C 250VAC/10A D4,2xL11mm

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770.121 ESKA  
770.121

Fuse thermal 121°C 250VAC/10A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40108
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770.128 ESKA  
770.128

Fuse thermal 128°C 250VAC/10A D4,2xL11mm

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Ord. No.: 40109
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770.144 ESKA  
770.144

Fuse thermal 144°C 250VAC/10A D4,2xL11mm

Thermal Cutoffs

Ord. No.: 40111
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770.152 ESKA  
770.152

Fuse thermal 152°C 250VAC/10A D4,2xL11mm

Thermal Cutoffs

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770.167 ESKA  
770.167

Fuse thermal 167°C 250VAC/10A D4,2xL11mm

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770.184 ESKA  
770.184

Fuse thermal 184°C 250VAC/10A D4,2xL11mm

Thermal Cutoffs

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SF188R0 SCHOTT  
SF188R0

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

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SF214R0 SCHOTT  
SF214R0

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

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770.229 ESKA  
770.229

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SF240R0 SCHOTT  
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A1-F AUPO  
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A3-F AUPO  
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Thermal Fuse 125°C 2A Radial

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A4-F AUPO  
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A5-F AUPO  
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