New Industry Products

Bourns Introduces its Smallest Miniature Resettable Thermal Cutoff TCO Devices

October 16, 2019 by Bourns

This article features Bourns CB Series as smallest miniature resettable Thermal Cutoff (TCO) devices designed for protection of LiPo and prismatic cells.

RIVERSIDE, Calif., October 16, 2019 - Bourns, Inc., a leading manufacturer, and supplier of electronic components, today introduced the company's smallest miniature resettable Thermal Cutoff (TCO) devices designed for overtemperature and overcurrent protection of lithium polymer and prismatic cells. The Bourns® Model CB Series is the company's next generation of axial leaded TCO devices that control abnormal, excessive current virtually instantaneously, up to rated limits. This latest series is more than 26 percent smaller than Bourns' successful NR Series, yet has the same current-carrying capability. The devices' low-profile 0.8 mm height and body width of 2.5 mm makes this series ideal for smaller batteries in smartphones and portable electronics, yet their high current carrying capability also makes them optimal for next-generation notebook and tablet PC battery cells.


Bourns Model CB Series

Image courtesy of Bourns.


Offering resistance levels as low as 2.2 milliohms, the Bourns® Model CB Series has current capabilities from 6 A up to 11 A at 60 °C as well as a welding projection option. These new miniature resettable TCO devices are available in four trip temperature options of 72 °C, 77 °C, 82 °C and 85 °C with a ±5 °C tolerance. The temperature options can be further narrowed upon request. In addition, the construction of the CB Series uses a high corrosion resistant bimetal mechanism to withstand the most humid environments.

Available now, Bourns® Model CB devices are RoHS compliant* and halogen-free** with UL agency recognition. For more detailed product information, please see Bourns CB.


About Bourns

Bourns, Inc., is a leading manufacturer and supplier of position and speed sensors, circuit protection solutions, magnetic components, microelectronic modules, panel controls, and resistive products. Headquartered in Riverside, California, USA, Bourns serves a broad range of markets, including automotive, industrial, consumer, communications, non-critical life support medical, audio and various other market segments. Additional company and product information are available at Bourns Website.

Bourns® and the Bourns logo are trademarks or registered trademarks of Bourns, Inc. and may be used publicly only with the permission of Bourns and require proper acknowledgment. Other listed names and brands are trademarks or registered trademarks of their respective owners.​