Description
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 reverseovercurrent 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 multiple ampere ratings to match specific
requirements in a variety of applications.

Features/Benefits
 Full range, fast-acting fuse helps eliminate common lowoverload faults  Prevents power generation losses due to nuisance
tripping from changes in temperature
 Both PCB mount and dead-front holder options available

Applications
 Inverters  Combiner boxes
 Battery charge controllers

Specifications
Voltage Rating 1000 V dc
Amperage Rating 1, 2, 3, 3.5, 4, 5, 6, 8, 10, 12, 15, 20, 25, 30
Max. Interrupting Rating 20 kA - 1 A - 20 A
50 kA - 25 A - 30 A
Time Constant ≤ 2ms
Material Body: Melamine
Caps: Copper Alloy
Approvals UL Listed (File: E339112)
CSA Certified (File: 029862_0_000)
TUV (Cert: J 50494849)
Applicable Standards UL 248-1, 248-19
IEC 60269-6
Environmental RoHS Compliant
Country of Origin Mexico