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Approvals & Standards

  • UL Listed to Standard UL 248-19
  • CSA Component Certified C22.2
  • IEC 60269-6
  • UKCA

Key features & benefits

Mersen’s range of 1500VDC photovoltaic (PV) fuse series is designed specifically to meet higher amperage demands of today’s PV circuits. Mersen’s 20x65mm form factor is designed to handle the harsh cyclical loads and thermal conditions of our customers’ highest amperage applications. These 1500VDC rated fuses are designed for low minimum breaking capacity capabilities of 1.35 times the fuse rated current value, which allows for safe circuit interruption under typical low fault current conditions. In addition to the standard ferrule terminal, fuses are also available with Crimp Cap terminals for in-line fuse applications. The unique wire crimp terminal (CC option) permits solderless wire-to-fuse connection for overmold encapsulation of fuse and wiring. Protect your off-grid or grid tied PV system from unexpected line faults using Mersen’s HelioProtection® fuse line.

More specifications


  • All photovoltaic applications
  • PV string/array level protection
  • Combiner box applications
  • In-line PV module protection
  • Inverters
  • Battery charge controllers

Product Specifications

Item Number



HelioProtection® Fuse 1500VDC 25A 20x65mm  

EAN/UPC code


Rated voltage DC UL

1500   V

Rated current

25   A

ROHS Compliant


AC or DC


Fuse class






AC Max I.R./Breaking Capacity: I1

50   kA

Contact materials

Tin-Plated Copper  

Connection/Terminal Type


Body/Insulating Material


Product Weight

0.0499   kg

Product Diameter

20.7   mm

Product Length

65   mm

Sell Pack Quantity

25   EA

Sell Pack Weight

1.3109   kg

Sell Pack Width

108   mm

Sell Pack Length

108   mm

Sell Pack Height

66.8   mm