Thyristor Safeguards Against Damaging Overvoltage Transients


High power density, small-footprint, surface-mount SOD-123FL solution simplifies PCB design

CHICAGO — Littelfuse, Inc. introduced the first PxxxxS4xLRP Series SIDACtor Protection Thyristor, a robust solution for protecting Composite Video Blanking Sync (CVBS) signal lines and ports from damaging overvoltage transients. The combination of 6V operating voltage and 100A 5/310µs surge peak current capabilityand a low junction capacitance rating make the P0080S4BLRP ideal for protecting a wide range of equipment needs data line protection. The PxxxxS4xLRP Series provides a compact, surface-mount solution which simplifies designing it into PCB layout.

Typical applications for the PxxxxS4xLRP Series SIDACtor Protection Thyristor include:

  • TV/camera CVBS cables

  • data communications

  • Set Top Boxes (STBs)

  • RS-485, RS-232 data lines

  • CAN Bus

The PxxxxS4xLRP Series SIDACtor Protection Thyristoroffers these key benefits:

  • Compared to existing solutions on the market, it provides higher power density in a smaller footprint, which makes it preferable for compact product designs.

  • An operating voltage of 6V with 100A 10/700µS, 4kV surge peak current capability, and junction capacitance of < 30pF make it well-suited for low voltage signal line protection applications, such as 4.43MHz CVBS signals, RS-484, RS-323 data lines or CAN Bus.

  • The compact surface-mount SOD-123FL package simplifies designing it into PCB layouts.

The PxxxxS4xLRP Series SIDACtor Protection Thyristor is available in SOD-123FL packaging in tape and reel format in quantities of 3,000. Sample requests may be placed through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit