Special Purpose Fuses

Photovoltaic Fuses

HelioProtection® HP15G Fuses - Photovoltaic

Mersen’s HP15G photovoltaic (PV) fuse series was engineered specifically for PV module ground fault protection of photovoltaic systems. Its enhanced construction makes it ideal for continuous temperature and current cycling withstand adding to system longevity. The 1500VDC rated HP15G, designed for low minimum breaking capacity capabilities of 1.35 times the fuse rated current value, allows for safe circuit interruption under typical low ground fault current conditions produced by PV arrays. In addition to the standard ferrule terminal, these products are 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 ground faults and string faults using Mersen’s HelioProtection® fuse line.



  • Low fault current interrupting capability
  • Durable construction for enhanced system longevity
  • Temperature cycle withstand capability
  • Guaranteed operation at temperature extremes
  • Industries first UL Listed Solution
  • Globally accepted


  • Voltage Range (VDC) 1500 VDC
  • Ampere Range (A) 2.5-5 A
  • I.R DC (kA) 10kA I.R. DC kA
    50 kA
    Self Certified to 50kA I.R.DC kA
  • Size per Standard
    10 X 57 mm
  • Speed / Characteristic
  • Mounting In-line Wire Crimp
  • Connection Terminal Type Wire Crimp
  • Body Style Cylindrical
  • Body Material GMG
  • Materials Contact Ni-plated Cu
  • SCCR 50 kA
  • Wiring Range
    #10 -12 AWG (6-4 mm2)
  • Standards UL Listed to Standard UL2579 File E333668
    IEC 60269-6
  • Application In-line PV module protection
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Consult Technical Services


  • HP15G2-1/2CC
  • HP15G2½
  • HP15G3
  • HP15G3-1/2CC
  • HP15G3CC
  • HP15G3½
  • HP15G4
  • HP15G4CC
  • HP15G5
  • HP15G5CC


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