Model CB Series Miniature Resettable Thermal Cutoff Devices

Bourns Model CB series of miniature resettable thermal cutoff (TCO) devices are the smallest TCO devices Bourns has produced. They are an axial leaded miniature resettable thermal cutoff device.

The CB series is about 26.5% smaller than the NR series and 64.8% smaller than the HC series. With resistance levels as low as 2.2 mΩ, the CB series can carry the same level of current as its larger counterparts in the HC and NR series.

The CB TCO devices are available in four trip temperature options of +72°C, +77°C, +82°C, and +85°C with a ±5°C tolerance. They have current capabilities from 6 A up to 11 A at +60°C. The very low-profile height of 0.8 mm and body width of 2.5 mm makes this series ideal for smaller batteries in smartphones and portable electronics. The high current carrying capability means these miniature devices will be suitable for next-generation notebook PC and tablet battery cells. These devices have been designed to withstand humid environments and use a high corrosion resistant bimetal mechanism.