LSP10 Series - Thermally Protected Surge Protective Device

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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

Littelfuse LSP10 Surge Protection Modules provide transient overvoltage protection for outdoor and commercial LED lighting fixtures. Constructed with Littelfuse thermally protected Varistors, they provide robust surge current handling capability. A built-in thermal disconnect function provides additional protection from catastrophic failures and fire hazards, even under the extreme circumstances of Varistor end of life or sustained overvoltage conditions. The LSP10 is available with either parallel or series connections. With the parallel-connected version, an indicator wire can activate an LED to tell maintenance personnel when to replace the SPD in order to ensure the luminaire remains protected. The series-connected version cuts luminaire power off to provide a clearly visible indication the SPD should be replaced.


  • Maximum Lightning Surge Current: 20,000A
  • 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
  • Compact form factor (48x48x30mm) with mounting tabs
  • UL1449 Type 4 component assemblies recognition
  • Compliant with IEC 61643-11 Class II and EN61643-11 Type 2* (*Self-declared compliance)

  • Outdoor and commercial LED lighting
  • Roadway lighting
  • Traffic lighting
  • Digital signage
  • Service entrance lighting
  • Parking garage/lot lighting
  • Flood lighting
  • Tunnel lighting
  • Street lighting

Access specifications, certifications, check availability and order parts below

Catalog #VMAX AC (V)(ITM 1xAmps (A)PolarityStockSamplesCompare
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
LSP10120S THERMALLY PROTECTED VARISTOR RoHS No 12/20/2011 PbFree No 12/20/2011 CoC_RoHS10_LSP10120S_12-18-2017 No
LSP10240P THERMALLY PROTECTED VARISTOR RoHS No 12/20/2011 PbFree No 12/20/2011 CoC_RoHS10_LSP10240P_12-18-2017 No
LSP10277P THERMALLY PROTECTED VARISTOR RoHS No 12/20/2011 PbFree No 12/20/2011 CoC_RoHS10_LSP10277P_03-25-2021 REACH211_Declaration_LSP10277P_03-25-2021 No
Does not Contain
LSP10277S THERMALLY PROTECTED VARISTOR RoHS No 12/20/2011 PbFree No 12/20/2011 CoC_RoHS10_LSP10277S_09-26-2017 REACH197_Declaration_LSP10277S_03-13-2019 No
Does not Contain
LSP10480P THERMALLY PROTECTED VARISTOR RoHS No 12/20/2011 PbFree No 12/20/2011 CoC_REACh181_LSP10480P_06-04-2018 No
LSP10480S THERMALLY PROTECTED VARISTOR RoHS No 12/20/2011 PbFree No 12/20/2011 CoC_RoHS10_LSP10480S_08-04-2021 REACH219_Declaration_LSP10480S_08-04-2021 No
Does not Contain
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