Description
RailClamps are surge rated diode arrays designed to protect high speed data interfaces. The SRDA series has been specifically designed to protect sensitive components which are connected to data and transmission lines from overvoltage caused by electrostatic discharge (ESD), electrical fast transients (EFT), and lightning.
The unique design incorporates surge rated, low capacitance steering diodes and a TVS diode in a single package. During transient conditions, the steering diodes direct the transient current to ground via the internal low voltage TVS. The TVS diode clamps the transient voltage to a safe level. The low capacitance array configuration allows the user to protect up to four high-speed data lines. The SRDA05-4 may be used to protect lines operating up to 5 volts while the SRDA12-4 may be used on lines operating up to 12 volts.

FEATUREs
✦ Transient protection for high-speed data lines to
   IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
   IEC 61000-4-4 (EFT) 40A (5/50ns)
   IEC 61000-4-5 (Lightning) 24A (8/20μs)
✦ Array of surge rated diodes with internal TVS diode
✦ Protects four I/O lines
✦ Low capacitance (<15pF) for high-speed interfaces
✦ Low operating and clamping voltages
✦ Solid-state technology

APPLICATIONs
✦ USB Power and Data Line Protection
✦ T1/E1 secondary IC Side Protection
✦ T3/E3 secondary IC Side Protection
✦ HDSL, SDSL secondary IC Side Protection
✦ Video Line Protection
✦ Microcontroller Input Protection
✦ Base stations
✦ I2C Bus Protection