Littelfuse LSP Battery Strap PolySwitch® Resettable PPTCs

Littelfuse LSP Battery Strap PolySwitch® Resettable Polymetric Positive Temperature Coefficient (PPTCs) devices offer several material platforms to help protect battery applications. The LSP PPTCs feature high trip temperatures, a broad range of hold current ratings, and high voltage ratings. The Littelfuse LSP Battery Strap PolySwitch® Resettable PPTCs provide a 16VDC voltage rating in a -40°C to +85°C temperature range.


  • Qualified to AEC-Q200 for automotive applications
  • Compact size (chip length and width)
  • 3.8A and 5.5A hold current ratings
  • 16VDC voltage rating
  • Compatible with high-volume electronics assembly
  • Low-resistance devices increase battery operating time
  • Lead-free, Halogen-free, and RoHS compliant


  • E-call module backup battery packs
  • Mobile radio device battery packs
  • Mobile medical device battery packs
  • Intelligent vacuum cleaner battery packs


  • Hold current ranges
    • 1.7A to 5.9A for LSP380
    • 2.60A to 7.50A for LSP550
  • 8.0A to 10.2A minimum trip currents
  • 16VDC maximum withstanding voltage
  • 51.5W or 2.8W power dissipation
  • Minimum resistance ranges
    • 0.013Ω to 0.028Ω for LSP380
    • 0.008Ω to 0.018Ω for LSP550
  • -40°C to +85°C temperature range
  • +125°C typical activation temperature
Published: 2021-11-04 | Updated: 2022-03-11