Littelfuse SPF Series Solar Fuses Ferrule Type ? 1000 Vdc 1-30 A

Littelfuse SPF Series Solar Fuses – 1000 Vdc – 1-30 A – Ferrule Version




The SPF Solar Protection Fuse series has been specifically designed for the protection of photovoltaic (PV) systems. This family of Midget style fuses (10 x 38 mm) can safely protect PV modules and conductors from reverse over-current conditions.

As PV systems have grown in size, so have the corresponding voltage requirements. This increase in system voltage has typically been intended to minimize power loss associated with long conductor runs. Standard circuit protection devices are not designed to completely protect photovoltaic panels. However, the SPF series is UL Listed to safely interrupt faulted circuits up to this demanding voltage level.

Littelfuse offers 14 ampere ratings (Select ampere rating below) to match specific requirements in a variety of applications.


  • Meets UL and IEC photovoltaic standards
  • UL 248-19 Listed 1000 Vdc maximum
  • 1-30 A ratings available
  • 20,000 A Interrupting Rating – 1A – 20A
  • 50,000 A Interrupting Rating – 25A – 30A


  • Inverters
  • Combiner boxes
  • Battery charge controllers

Product Information

Voltage Rating

1000 VDC

Amperage Rating

1A, 2A, 3A, 4A, 5A, 6A, 8A, 10A, 12A, 15A, 20A, 25A, 30A

Max. Interrupting Rating

20 kA – 1A – 20A 50 kA – 25A – 30A

Time Constant

? 2ms


Body: Melamine Caps: Copper Alloy


UL 248-19 Listed (File: E339112) IEC 60269-6 (1-30 A) CSA Certified (File: 029862_0_000)

Technical Documents

Spec Sheet Download