Bourns Introduces its first AEC-Q200 Tested Overtemperature Protection Mini-Breaker Devices that Broaden their Application Usage

Offering breakthrough protection for heater circuits, Bourns® Model AD and SD Series mini-breakers deliver industry-first resettable options in the industry's widest trip temperature range*

RIVERSIDE, Calif., March 13, 2023 - Bourns, Inc., a leading manufacturer and supplier of electronic components, today introduced its AD and SD Series miniature thermal cutoff (TCO) mini-breaker devices. Delivering an advanced level of resettable, accurate and repeatable overtemperature protection that has not been available before in a miniature device, the AD and SD series mini-breakers offer multiple industry-first capabilities. These are the first mini-breakers that can be either surface mountable (SD Series) or axial leaded/weldable (AD Series). They are the first to offer non-automatically resettable (self-hold) or automatically resettable (non self-hold) function options. These are also the first mini-breakers with such a wide trip temperature range (55 °C up to 150 °C). In addition, these mini-breaker series have been tested by Bourns to AEC-Q200 equivalent test standards.

Additional valuable features of the new Bourns® Model AD and SD Series mini-breakers include high trip accuracy of just plus or minus 5 °C, and very low resistance values of 4 milliohms max. These highly-repeatable devices offer ratings up to 10,000 cycles and can be used as resettable overtemperature protectors or sensors in a battery system.

"As a leading developer of miniaturized overtemperature protection solutions for more than 30 years, our goal in designing the Model AD and SD Series was to significantly push the boundaries of mini-breaker device capabilities to expand their use in a new range of markets and applications," said Brian Ahearne, Thermal & Precision Division Product Line Director at Bourns. "The series' wide trip temperature range makes them ideal for a variety of heater circuits that previously did not have overtemperature protection, or had to use bulky solutions or limited use single-blow fuses. Resettable overtemperature protection available in such miniature packages is a unique and beneficial solution to these applications and now many others."

Bourns® Model AD and SD Series mini-breakers are available now and are RoHS compliant** and halogen free***. For more detailed product information, please see:

*Any comparative claims made herein are made as of the date of publication and are made to the best of Bourns' knowledge after reasonable investigation. For more information, please contact Bourns Customer Service.

**RoHS Directive 2015/863, Mar 31, 2015 and Annex.

***Bourns considers a product to be "halogen free" if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.


ボーンズ社(Bourns, Inc.) は、位置センサー、速度センサー、回路保護ソリューション、磁気部品、マイクロ電子モジュール、パネル制御部品、抵抗部品の一流メーカーであり、サプライヤーでもあります。米国カリフォルニア州リバーサイドに本社を置く Bourns は、自動車、産業、消費者、通信、ノンクリティカルなライフサポート医療、オーディオをはじめとする多様な市場セグメントにおいて活動しています。当社および製品に関する詳しい情報は、 をご覧ください。

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Annette Keller
Keller Communication
(949) 947-7232
Josephine Chen
Bourns Asia Pacific, Inc.
886-2-2562-4117 #138