Out thermal cutoffs ensures the safe and reliable operation of a wide range of products in which they are incorporated, providing optimal safety solutions.

A thermal switch is an electromechanical device which opens and closes contacts to control the flow of electrical current in response to temperature change.

The term “Thermal Cutoff Switch” generally refers to how the switch is used, ie. It cuts off the current to critical machinery when a temperature limit is exceeded preventing potential burn out or failure.  The applications of, and need for electromechanical thermal switch devices are broad and cover a huge diversity of industry applications. In their most basic form, they can be found on home appliances such as dryers for over temp protection.  Thermal cutoff switches are also used widely in industrial equipment.

Asiatronix is acting as European local office for Uchihashi,  leader in thermal cutoff.

Uchihashi Estec is into the manufacturing of thermal cutoffs since 1918. Since then, the company has been pursuing advanced special alloy processing techniques and applied technologies. For nearly a century, the company has been spearheading the development of the most advanced alloy technologies – including the successful commercialization of the world’s first small alloy thermal cutoffs – while helping improve product safety and reliability in the manufacturing industry.

Uchihashi thermal cutoffs ensures the safe and reliable operation of a wide range of products in which they are incorporated, providing optimal safety solutions.


Accurate, reliable range of solutions to the need for upper limit temperature protection: 

  • Thermal cutoffs - axial type from 0.3 to 11 A
  • Thermal cutoffs - radial type from 0.8 to 3 A
  • Thermal cutoff/ Resistor Assemblies from 1 to 3 W
  • Thermoprotector with resistor (A5MC for example) working at 12 A rated current
  • Fusing Resistor (BZ05 for example) up to 120 A rated current



We have a wide selection of high quality solutions within thermal cutoffs.

  • Non resettable thermal cutoff which uses fuseble alloy for its thermal element
  • Extremely simple construction ensures reliability
  • Hermeticcaly sealed thermal element reduces deterioration with age
  • Superior thermal sensitivity
  • Insulating container
  • Detecting current is 0.1A or less

Within thermal cutoff, Uchihashi has different type available: 



  • From 0.3 to 11A - AC 250V and DC 50V
  • Different sizes: from 1.4 mm to 3.3 mm
  • Specific series for Lithium Ion Rechargeable Batteries, overheat protection of voltage dependent resistor, surge protection evice, lighting surge protection



  • From 0.8 to 3 A (AC 250V)
  • Case lenght from 4 to 11 mm
  • Series with ceramic case for higher thermal sensitivity
  • Specific series for flow soldering, screw fixing, etc....



  • From 10 to 15 A (AC 250V)
  • Metal case and sense temperature material of organic compound pellet
  • non return type