Thyristor TSPD 120V 11A 8-Pin SOIC T/R

The protector has been designed to protect dual polarity supply rail SLICs (Subscriber Line Interface Circuits) against overvoltages on the telephone line caused by lightning and a.c. power contact and induction. Both devices have been designed using the latest understanding of programmable protector technology to maximize performanceThe program or gate pins are connected to the positive and negative SLIC battery supplies to give protection which will track the SLIC supply levels. The integrated transistor buffer is an essential element in this type of device as the current gain of around 150 reduces battery loading to below 5 mA during a.c. power induction or power contact conditions. Additionally the Base-Emitter junction acts as a reverse blocking diode during operation preventing unnecessary loading of the power supply.

• Negative Overvoltage Protector
  • Wide 0 to -110 V Programming Range
  • Low +5 mA Max. Gate Triggering Current
  • High -150 mA Min. Holding Current