Littelfuse – LSP05 and LSP10 Surge Protection Modules Extend the Lifetime of your LED Lighting with Reliable Surge Protection

The LSP05 and LSP10 surge protection modules from Littelfuse provide transient over-voltage protection for outdoor and commercial LED lighting fixtures. They provide robust surge current handling capability.

The close proximity of the integrated thermal element to the varistor body ensures quick response to lightning-induced surges or nearby load switching.

Applications include outdoor and commercial LED lighting, including roadway lighting, traffic lighting, digital signage, service entrance lighting, parking garage/lot lighting, flood lighting, tunnel lighting, and street lighting.


  • Maximum lightning surge current: 20,000A (LSP10); 10,000A (LSP05)
  • Thermally protected varistor technology
  • Series connected option for LSP10 module provides clear indication of SPD replacement by turning off luminaire
  • IP66 water-proof and dust-proof
  • Indication wire options
  • UL1449 Type 4 component assembly recognition; IEC61643-11 Class II and EN 61643-11 Type2 compliance
  • Compact form factor (48 x 48 x 30mm) with mounting tabs


  • Digital signage
  • Flood lighting
  • Parking garage lighting
  • Roadway lighting
  • Street lighting
  • Traffic lighting
  • Tunnel lighting
  • Wall wash lighting



  • Optimized surge immunity solution to protect outdoor LED fixture investments
  • Internal varistors thermally protected to prevent failure due to end-of-life or continuous over-voltage faults
  • Clear indication of SPD replacement prevents future surge damage to luminaire
  • Flexible outdoor installation locations, inside or outside of luminaire, top or bottom at lighting pole, in transformer box or on distribution panel
  • Facilitates an indicating/monitoring circuit for SPD replacement for parallel connected modules
  • Suitable for lighting fixtures used around the world
  • Small size makes it easier to mount inside luminaire; mounting tabs simplify installation and replacement