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Bourns AD and SD Miniature Thermal Cutoff (TCO) devices are resettable mini-breaker devices offering advanced overtemperature protection technologies. These TCO devices use a highly-rated corrosion-resistant bimetal mechanism for better endurance in humid environments. The SD and AD TCO devices are either non-automatically resettable (self-hold function) or automatically resettable (non-self-hold function). These TCO devices feature overcurrent protection and control abnormal, excessive current virtually instantaneously, up to rated limits.
The SD and AD TCO devices operate at 4mΩ maximum resistance, 55°C to 150°C trip temperature range with ±5°C tolerance. These TCO devices are ideally used in heaters, motors, battery packs, and lithium-ion batteries in PCs, tablets, smartphones, and power banks.
