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

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

We are offering a wide range of Uchihashi thermal cutoffs from stock in Europe

  • 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


Some series example below:


  • High performance tco which combine two coil-winding resistors with a fusible alloy type thermal cutoff
  • It reduces the mounting space and decrease the number of components
  • It uses a coil-winding for greater ability to withstand inrush current
  • the marking printed on the topside make easier to confirm the products
  • Non-resettable thermal cutoff
  • Extremely simple construction ensures reliability, and hermetically sealed thermal element reduces deterioration with age
  • Superior thermal sensitivity
  • Insulating container
  • NC Series: suitable for reflow soldering
  • High performance thermal cutoff which combine a cement resistor with a fusible alloy type tco 
  • Overheat protect function
  • Superior characteristics against inrush current
  • Extremely robust electrical insulation and voltage withstanding properties after it functioned 


HIGH CURRENT TCO - BZ05 SERIESfuse_bz05_Series_Uchihashi_asiatronix

  • It can accept high current, 75A DC, and open a circuit quickly by receiving signal-current.
  • It can open a circuit quickly, within 60 sec. at room temperature by low signal current, below 1.5A
  • Resistor portion is connected to fuse portion electrically and it can cut off the both portions simultaneously.
  • It can be installed by fastening screw.
  • It is suitable for overcharge protect circuit of Lithium-Ion battery pack.
  • It does not contain lead (Pb) and cadmium (Cd) in compliance with RoHS.
  • It does not contain 46 substances of very high concern (SVHC) that are specified by REACH as of Dec. 2010.



You can find all the product range here 

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for technical information, cross reference, stock availability or  quotation 


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.