Littelfuse Reveals MHP–TAC Resettable Over-Temperature Protection Devices

Littelfuse has launched the MHP–TAC (Metal Hybrid PPTC – Thermal Activated Compact) Series Resettable Over-temperature Protection Devices, the latest addition to its line of battery mini-breakers.

These devices connect a PPTC (Polymeric Positive Temperature Coefficient) device in parallel with a bimetal protector (a resettable thermal cut-off device) to protect the high-capacity lithium-ion polymer (LiP) and prismatic battery cells used in mobile devices and consumer electronics from damage caused by overheating and overcurrents.

When compared with other devices of this type, the Littelfuse MHP–TAC Series offers higher voltage ratings, higher hold currents, more temperature rating options, and a thinner, smaller form factor, which reduces battery pack design space requirements. The combination of small form factors, high cell capacities and high battery discharge rates typical of LiP and prismatic battery protection applications demands a circuit protection device with low thermal cut-off temperatures (<90ºC), high hold current ratings (>6A) and a compact size.

Typical applications for MHP-TAC Series Resettable Over-temperature Protection Devices include LiP and prismatic battery cells intended for use in battery-powered devices such as notebook PCs, ultra-books, tablets, smartphones, and e-cigarettes

“At just 4.75mm x 2.80mm x 0.80mm, the MHP-TAC Series is the smallest overtemperature protection device available for lithium-ion battery cells used in today’s mobile devices and consumer electronics,” said Amy Chu, Product Manager, Electronics Business Unit at Littelfuse. “Not only can it help our battery manufacturer customers save valuable design space and weight, but it helps their products meet today’s heightened battery safety requirements.”

The Key Benefits of the MHP-TAC Series Resettable Over-temperature Protection Devices include:

• High voltage and high current ratings and low resistance ensures the MHP-TAC Series is capable of handling the battery voltages and battery charge/discharge currents common in the high-capacity lithium-ion polymer (LiP) and prismatic cells
• The thin, compact form factor saves space, simplifying circuit protection in ultra-thin battery pack designs.
• Welding extension leads can be customized, which can facilitate matching them to the battery design.

Availability
MHP-TAC Over-temperature Protection Devices are available in bulk in quantities of 1,000. Sample requests may be placed through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit Littelfuse.com.

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