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Failsafe chip varistors for automotive battery lines

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By Nick Flaherty

The new chip varistors offer reliable protection against transient surge voltages according to ISO 7637-2, and meet the failsafe requirements according to the VW standard VW 80808. Even when subject to excessive bending stress, short-circuits are avoided, which is particularly important for unswitched battery terminals.

The new surge protection components are designed for an operating voltage of 14 VRMS or a maximum direct voltage of 16 VDC. The three types of the B725*0G1140S862 series are designed for surge currents of 120 A, 200 A and 400 A, with each 8/20 µs. Depending on the surge current capability, the chip varistors are available in sizes EIA 0805, 1206 and 1210, and are suitable for a wide temperature range of -55°C to +150°C.

Type Ordering
code
Operating voltage, max. [V] Surge current, max. (8/20 µs) [A] Terminal voltage
[V]
VRMS  VDC
CT0805S14BAUTOGOM_G B72510G1140S862 14 16 120 42
CT1206S14BAUTOGOM_G B72520G1140S862 14 16 200 40
CT1210S14BAUTOGOM_G B72530G1140S862 14 16 400 40

Further information is at www.tdk-electronics.tdk.com/en/ctvs

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