New Industry Products

1.5kV Solar Fuses offer Higher Amperage in a 25 Percent Smaller Case

January 04, 2020 by Paul Shepard

Littelfuse, Inc. announced the expansion of its SPXI series in-line and SPXV series string solar fuses with 25 to 32 amperage models in a compact 10mm x 85mm case size. Used in photovoltaic installations, these 1500Vdc fuses protect PV systems from overloads and short circuits to minimize damage to solar panels. The compact case size offers design flexibility when space is at a premium.

“As the solar panels create more energy, and efficiencies increase, so does the demand for higher protection on the photovoltaic infrastructure,” said Sakthidharan Krishnamoorthy, product manager, Littelfuse Industrial Business Unit.

“With a 50kA dc interrupting rating, these 1500V fuses meet the latest code requirements – in a smaller case size – to make upgrading to a higher rating easier by using existing harnesses and fuse holders,” Krishnamoorthy concluded.

Other key benefits of the solar in-line and string fuses:

  • Product label features QR code, offering access to part numbers, volts, SAP variables, programming terms, and date codes in real time
  • SPXI and SPXV solar fuses meet UL 248-19 and IEC 60269-6 photovoltaic fuse standard requirements
  • SPXI solar fuses can be electrically insulated by overmolding or heat-shrinking to streamline the set-up process
  • SPXV fuses are compatible with existing Littelfuse touch-safe fuse holders, which have been rerated up to 32A