Littelfuse Surge Protection for Commercial & Outdoor LED Lighting

Lightning strikes are a fact of life, and can be a threat to outdoor 
lighting and electrical devices. A single lightning strike can deliver 
an electrostatic charge of millions of volts. A single strike can also 
create voltage surges of thousands of volts that can travel miles, 
effecting downstream lighting and devices in parks and stadiums, along 
roadways and bridges and in tunnels and parking lots and ramps. 
Unprotected street lights, electrical signage, traffic lights and 
roadway lighting can all go dark in an instant. Littelfuse

James R. Dukart

Lightning strikes are a fact of life, and can be a threat to outdoor lighting and electrical devices. A single lightning strike can deliver an electrostatic charge of millions of volts. A single strike can also create voltage surges of thousands of volts that can travel miles, effecting downstream lighting and devices in parks and stadiums, along roadways and bridges and in tunnels and parking lots and ramps. Unprotected street lights, electrical signage, traffic lights and roadway lighting can all go dark in an instant.

In addition, the move to more efficient LED lighting in many outdoor locations means circuitry that can be more sensitive to abnormal conditions than previous lighting technologies. This can be particularly true in areas subject to more frequent “transients” (such as lighting strikes) — again, outdoor stadiums, parks, along roadways and interstate highways, parking lots and bridges and tunnels.

Thus Littelfuse has introduced its new LSP05 and LSP10 Surge Protection Modules to provide transient overvoltage protection for outdoor and commercial LED lighting fixtures.

They new modules supply surge current handling capability up to 20,000 A for the LSP10 and up to 10,000 A for the LSP05. Both modules offer an integrated thermal element close to the varistor body, for faster response to lightning-induced surges or nearby load switching.

In addition to thermally protected varistor technology, the LSP10 offers a series connection module that cuts the luminaire power off in a surge event, triggering a maintenance call and module replacement. The device being turned off is a clear signal to replace the protection module, which in turn protects the luminaire from subsequent potential surge events. With a parallel version only, the fixture is likely exposed once the elements activate and the module’s surge protection is used up.

Both the LSP10 and LSP05 modules are IP66 water- and dust-proof, have UL 1449 Type 4 component assembly recognition and are IEC61643-11Class II and EN 61643-11 Type 2 compliant. The modules come in a compact form factor designed for ease of installation within fixtures and with mounting tabs to simplify initial installation and replacement.


Photo courtesy of Littelfuse