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Cylindrical solar fuse, 25A 600V, fiberglass body, rejection style

Bussmann

Bussmann PVS-R-25 25A 600V AC/DC Cylindrical Solar Fuse

SKU CH-R2EK-Z3X48

A 25 A, 600 V AC/DC cylindrical solar fuse with 200 kA AC and 20 kA DC interrupt ratings, Class RK5, UL 2579 listed

  • 25 A rating protects photovoltaic strings up to 600 V
  • Fast-acting response limits fault energy in DC circuits
  • 200 kA AC interrupt rating handles high short-circuit currents
  • 20 kA DC interrupt rating meets UL 2579 photovoltaic requirements
  • CSA C22.2 certified and UL 248-12 listed for code compliance

Solar PV circuit protection

The Bussmann PVS-R-25 is a 25A cylindrical fuse rated for 600V AC and 600V DC in photovoltaic arrays. It carries Class RK5 rejection construction and a 200kA interrupt rating at 600V AC. The fiberglass body meets UL 248-12 and UL 2579 photovoltaic standards with CSA component certification.

Sustained overcurrent response

Fast-acting operation clears fault current quickly to protect conductors and downstream equipment during prolonged overloads. The single-element design provides consistent performance across the full 600V DC rating without nuisance opening. A 20kA DC interrupt rating handles high fault energy typical in large string installations.

Replaces standard RK5 fuses in solar combiner boxes

Installers upgrading from non-rejection or lower-voltage fuses gain code-compliant photovoltaic listing and higher DC interrupt capacity. The jump is worth it when system voltage reaches 600V DC or when AHJ requires UL 2579 listing. Not suited for applications needing visual blow indication or AC-only ratings below 600V.

Highlights

  • 25 A rating protects photovoltaic strings up to 600 V
  • Fast-acting response limits fault energy in DC circuits
  • 200 kA AC interrupt rating handles high short-circuit currents
  • 20 kA DC interrupt rating meets UL 2579 photovoltaic requirements
  • CSA C22.2 certified and UL 248-12 listed for code compliance

Specifications

BrandEATON BUSSMANN

Questions about this item

Does the 25 A cylindrical fuse generate noticeable heat or noise when carrying full load continuously in a solar array?

The fuse is a passive component with no moving parts, so it produces no audible noise. Normal operation at rated current creates some warmth, but the fiberglass body and fast-acting element are designed to stay within safe temperature limits during continuous 25 A service.

What holder or fuse block must I already have to install this 13/16 in diameter Class RK5 rejection fuse?

You need a 600 V Class RK5 fuse block or disconnect that accepts a 5 in long by 13/16 in diameter cylindrical fuse with rejection feature. Standard Class H or K blocks will not accept the rejection groove.

Will this PVS-R-25 coordinate with older 600 V DC combiner boxes that use 20 kA interrupt-rated fuses?

Yes. The fuse carries a 20 kA interrupt rating at 600 V DC, matching the typical rating of legacy combiner hardware, and its fast-acting characteristic provides equivalent or faster clearing under fault conditions.

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