Electronicdesign 5272 Teconn1126 B2
Electronicdesign 5272 Teconn1126 B2
Electronicdesign 5272 Teconn1126 B2
Electronicdesign 5272 Teconn1126 B2
Electronicdesign 5272 Teconn1126 B2

Hybrid AC Device Boasts Overcurrent, Overvoltage Protection

Nov. 24, 2012
By combining a polymeric positive temperature coefficient (PPTC) device and a thermally enhanced metal oxide varistor (MOV) into one package, TE Circuit Protection created a hybrid device that offers an integrated, resettable approach to protect sensitive downstream electronics against damage from overcurrent and overvoltage
By combining a polymeric positive temperature coefficient (PPTC) device and a thermally enhanced metal oxide varistor (MOV) into one package, TE Circuit Protection created a hybrid device that offers an integrated, resettable approach to protect sensitive downstream electronics against damage from overcurrent and overvoltage. The resettable PPTC/MOV hybrid configuration avoids problems experienced with other typical approaches used in low-current applications to help prevent thermal runaway, such as the use of an MOV with a fuse, which must be replaced when blown; placing the PPTC device and MOV next to each other on the board, which can lead to thermal instability; and employing a thermal fuse integrated with an MOV, a one-use solution that can trip without allowing resettability. The 2Pro device, on the other hand, integrates thermally coupled components; can be reset; and provides stability by maintaining a varistor surface temperature under 150°C. Applications include LED lighting, smart meters, and power supplies.

TE CIRCUIT PROTECTION (a business unit of TE CONNECTIVITY LTD.)

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