SLP – RJ11 Telephone Line Protection


telephone line protection

The SLP1 RJ11 Telephone Line Protection series of surge suppressors provide protection to telecommunication equipment connecting via RJ11 plugs. Designed for traditional (2 wire) telephone circuits, the product is also compatible with modems and ADSL circuits.

The SLP1 RJ11 is a UL Listed secondary protector intended for use in facilities where primary protective devices have been installed at the service entrance. The SLP1 RJ11A is a high-energy multi-stage primary protector intended for non UL applications where higher surge ratings are required.


  • RJ11 sockets – simple plug-in connection for 4 or 6 position RJ plugs
  • 6.5” patch cord included – no additional cables required
  • SLP RJ11 is UL® 497A Listed
  • L-L & L-G protection – for comprehensive protection
  • Automatic overcurrent protection
  • ERICO Surge Products are covered by an extended warranty; see the attached document for more information


Telephone/modem systems including:

  • Industrial modems
  • Point-of-sale equipment
  • Vending machines
  • Fax machines
  • Security systems, fire alarms and other dial-up modems

More Information

Part No. Description Approvals
SLP1RJ11 RJ11 Telephone Protector, 500A 8/20µs UL®
SLP1RJ11A RJ11 Telephone Protector, 20kA 8/20µs A-Tick

UL is a registered trademark of Underwriters Laboratories, Inc.


SLP or HSP & SLP data sheet

Surge 5 Year Warranty