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Red cylindrical 15A 1000 VDC solar fuse in box

Littelfuse

Littelfuse SPF 15 15A 1000 VDC solar fuse

SKU CH-A5WF-ENEMP

15A 1000 VDC photovoltaic fuse protects solar circuits, red finish, sold as single unit

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Rated for 15 A continuous solar current
  • Handles 1000 VDC photovoltaic circuits
  • Red housing aids quick visual identification
  • Littelfuse quality for reliable over-current protection
  • Supplied as a single fuse in a box

Littelfuse SPF 15 solar fuse

The Littelfuse SPF 15 is a 15 amp photovoltaic fuse rated for 1000 VDC. It protects solar strings and combiner boxes in residential and commercial installations. Electricians and system integrators use it to meet overcurrent requirements for PV circuits. The red housing allows quick visual identification in the field.

Thermals noise and power

The fuse operates passively with no moving parts, so it generates no audible noise during normal service. Power dissipation occurs only when current flows, and the device runs cool within its rated 15 amp limit. No active cooling or airflow management is required for this component. It simply interrupts fault current when the threshold is exceeded.

Replaces older PV fuses

This fuse replaces any 15 amp 1000 VDC photovoltaic fuse that has aged or failed inspection. The upgrade is worth it when a system audit calls for fresh, certified protection devices. It is not suited for circuits requiring a different ampere rating or a lower voltage class. Buyers needing higher current capacity or AC-rated devices should select a different model.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 98% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameLittelfuse
Model nameLittelfuse SPF 15
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How do I install the Littelfuse SPF 15 fuse in my 1000 VDC solar string, and what step is often missed?

Insert the fuse into a compatible SPF-series holder rated for 1000 VDC, ensuring the holder is fully seated and the circuit is de-energised before installation; the step most often missed is verifying the holder’s voltage rating matches the 1000 VDC system.

What maintenance or replacement will the Littelfuse SPF 15 need over its service life?

The fuse is a single-use protective device; after it interrupts a 15 A overcurrent event it must be replaced with an identical 15 A, 1000 VDC SPF fuse — no routine maintenance is required.

What limit appears first when the Littelfuse SPF 15 runs continuously at full load in a hot combiner box?

The 15 A continuous-current rating is the first limit; sustained operation above 15 A or at elevated ambient temperature will cause the element to melt and open the circuit.

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