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News Release: KOA CORPORATION takes lead in new international standard for surface mount chip resistors

Article - December 9, 2023

Japan’s leading company when it comes to resistors, KOA is on a mission to enlighten users about the innovative new standard which will provide safety and security to resistor users”

KOA CORPORATION took the lead in the publication of IEC60115-8 Edition 3 which is an International Standard for surface mount chip resistors. KOA has taken this initiative to provide customers with safety and security by revising international standards as part of its commitment, as mentioned in the company introduction previously published. (The Worldfolio: KOA supporting electric and autonomous vehicles with resistors)

Edition 3 clarifies the relationship between the rated power and the operating temperature, while Edition 2 does not, which was achieved by fully changing the testing method to be based on the temperature of the terminal part (solder filet) of resistors. This modification enables Edition 3 to ensure the safer use of resistors.

KOA, ahead of its competitors, has adopted this method to determine the thermal specification based on the terminal part temperature, naming it “Terminal Part Temperature Specification”.  It would not be an exaggeration to say that such persistent activity led to the revision of the International Standard.

The detail of this standard revision is explained on KOA’s website. (please access through the below link or QR code)

Revision of an international standard related to rated power of resistors | KOA Corporation (