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Protecting Photovoltaic Systems with Solar Fuses

Littelfuse, with 60 million devices in photovoltaic power systems, comprehends the global challenges of the solar market.

Littelfuse Solar Fuses Manufactured in Suzhou, China

To address the soaring demand for solar energy in Asia, Littelfuse has extended solar fuse production at its Suzhou, China plant. This strategic move aims to:

  • Halve order lead times
  • Accelerate responses to inquiries and provide regional support
  • Leverage the plant's 25 years of manufacturing expertise with a skilled workforce

Our award winning Suzhou plant is equipped with over 6,000 square meters of manufacturing space, a team of 500 employees, and holds GB/T 19001-2016 / ISO 9001:2015 / IATF 16949:2016 certification. With 50% increased capacity, low-power testing capabilities, and a commitment to maintaining product quality, this expansion ensures reliable support for the growing global demand for solar fuses.

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Littelfuse Solar Fuses

The Littelfuse family of solar fuses are designed specifically to protect photovoltaic (PV) systems. Unlike standard circuit protection devices, these fuses are built to withstand the harsh environments of solar applications such as extreme temperatures and isolated or elevated locations as well as high-voltage levels.

Littelfuse Product
SPXI-Image-CN
SPXI_CN Series In-line Solar Fuse
  • 1500 V dc
  • Up to 32 A
  • Offers higher amperage protection in less space for increased design flexibility
  • One-piece cap design, without joints, offers easier wire crimping and more streamlined molding
  • Can be electrically insulated by either over-molding or using heat shrink
  • No fuse holder required helps save space, time, and money
SPXV-Image-CN
SPXV_CN Series Solar Fuse
  • Protection from low and high voltage, unbalance, single-phase, and reverse phase conditions
  • LED diagnostics is quick visual indicator for cause of trip
  • Adjustable trip delay to prevent nuisance tripping
  • DPDT relay output
Product-43283b12-9b03-4bbb-a7f3-17c255a934a7
SPF_CN Series Solar Fuse
  • Second set of voltage inputs for monitoring voltage on the load-side of the motor contactor to detect contact failure
  • Keeps history of the past 20 fault causes
  • Wirelessly download and view fault history
KLKD-Image-CN
KLKD_CN Series Solar Fuse
  • 600 V ac
  • 15 – 30 A
  • 10x38 mm size for solar combiner boxes, inverters, and circuits with dc fault currents up to 50,000 A
  • Offers fast, reliable short-circuit response
  • Provides backup overcurrent protection to supplement primary branch-circuit fuse or breaker
  • Available in standard and board-mount configurations
For more information on all the Littelfuse solar fuse products visit: Solar

Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.