RS-485 and RS-422 surge protective device for signal circuit.


  • Compliance with JIS C 5381-2 and category C2/D1
  • Impulse withstand current: 8/20µs-5kA (C2) • 10/350µs-2.5kA (D1).
  • Available in DIN rail installation.
  • Longer impulse current life and higher impulse withstand current than RSP-485M.


  • Data processing machines and control machines with RS-485 or RS-422 lines
  • Fire alarm apparatus systems
  • Security cameras
  • Coin-operated parking
  • Outdoor display units