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Surge protection provides 12V lines with up to 100A immunity

Posted: 05 May 2014  Print Version  Bookmark and Share

Keywords:Semtech  Tclamp  ESD protection 

Semtech Corporation has released a low-capacitance ESD protection dedicated to RS-485 interfaces and other 12V lines in industrial applications. It features high surge current capability of 100A and low clamping voltage for use in harsh transient environments.

Tclamp1202P is claimed as the smallest transient voltage protection array in its class, offering 100A (8x20µsec waveform) of surge immunity in a 2mmx2mm package. It can be used in a wide range of industrial and telecommunications applications for safeguarding sensitive communications transceivers from electrostatic discharge (ESD), electrical fast transients (EFT), cable discharge and lightning surge transients.

Tclamp1202P block diagram

The two-line device has a very low clamping voltage and a line-to-line capacitance of less than 12pF. The part's robust 100A surge rating for high-surge lightning protection meets the industry's stringent telecommunications and industrial surge requirements. Additionally, the flow-through layout of the part enhances signal quality and design flexibility. These benefits make the device suitable for safeguarding the many RS-485 interfaces deployed in telecom and industrial applications such as wireless base stations and digital surveillance cameras.

The company's TransClamp platform provides high surge immunity in very small packages. The high surge, low capacitance advantages are achieved with Semtech's process technology, which optimises surge immunity and clamping voltage with significant reductions in leakage current and capacitance.

The device features transient protection for high-speed data lines to: IEC 61000-4-2 ESD ±30kV (air), ±30kV (contact); IEC 61000-4-4 EFT 40A (5/50nsec); and IEC 61000-4-5 (lightning) 100A (8/20μsec).

- Graham Prophet
  EE Times Europe





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