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Approvals & Standards

  • UL listed to Standard 2579 File E333668 (70A to 600A)
  • UL listed to Standard 248 File E2137 (70A to 400A)
  • CSA Component Certified C22.2 (70A to 400A)

Key features & benefits

Mersen’s HP10J photovoltaic (PV) fuse series is designed specifically for DC Recombiner Boxes in the protection of 1000VDC photovoltaic systems. Its robust construction makes it ideal for continuous temperature and current cycling withstand adding to system longevity. The 1000VDC rated HP10J designed for low minimum breaking capacity capabilities of 1.35 times the fuse rated current value, allows for safe circuit interruption under typical low fault current conditions produced by PV arrays. Protect your off-grid or grid tied PV system from unexpected ground faults and line faults using Mersen’s HelioProtection® fuse line.

More specifications


  • Re-combiner box (sub-combiner, array combiner, master combiner) applications
  • Inverter DC input
  • Battery charge controllers

Product Specifications

Item Number


Item Description (ERP)

1000VDC 300A CLASS J PV FUSE -  


HelioProtection® Fuse 1000VDC 300A gPV EI Indicator HP10J - Photovoltaic Series  

EAN/UPC code


Rated voltage AC UL

600   V

Rated voltage DC UL

1000   V

Rated current

300   A

ROHS Compliant


Fuse class





Clip or Bolted  

AC Max I.R./Breaking Capacity: I1

200   kA

Indication System


Indication System Type

EI Indicator  

Contact materials

Silver-Plated Copper  

Connection/Terminal Type


Body/Insulating Material


Product Weight

0.8391   kg

Product Diameter

54.1   mm

Product Length

181.1   mm

Sell Pack Quantity

1   Each

Sell Pack Weight

0.88   kg

Sell Pack Width

76.2   mm

Sell Pack Length

85.9   mm

Sell Pack Height

189   mm