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Cylindrical fiberglass solar fuse with silver end caps

Bussmann

Bussmann PVS-R-35 Solar Fuse 35A 600V AC/DC Class RK5 line protection

SKU CH-KZS6-1F9DT

A 35 A, 600 V AC/DC Class RK5 cylindrical fuse for solar photovoltaic line protection with a 200 kA AC interrupt rating

  • 35 A rated current protects PV strings up to 600 V
  • Fast-acting Class RK5 clears faults in milliseconds
  • 200 kA AC and 20 kA DC interrupt rating handles heavy fault energy
  • CSA certified and UL 2579 listed for code-compliant installs
  • Cylindrical fiberglass body fits standard 5-1/2 in fuse holders

Solar PV line protection

The Bussmann PVS-R-35 is a fast-acting cylindrical fuse rated at 35 A for 600 V AC and 600 V DC photovoltaic circuits. It carries Class RK5 rejection styling and a 200 kA interrupt rating at 600 V AC, making it suitable for string-level overcurrent protection in commercial and utility-scale solar arrays. Installers specifying to UL 2579 and CSA C22.2 No. 248-12 will find this device listed for those standards.

Thermals and power behaviour

As a single-element fuse the PVS-R-35 dissipates heat only during fault interruption; normal operation adds negligible thermal load to the combiner or inverter enclosure. The fiberglass body maintains dimensional stability across the temperature range encountered in rooftop and ground-mount installations. No active cooling or derating calculations beyond the published 35 A rating are required for typical string currents.

Build and mounting implications

The 5-1/2 in length and 1-1/16 in diameter match standard Class RK5 fuse blocks, allowing drop-in replacement without panel redesign. Rejection tabs prevent insertion of lower-class fuses, enforcing coordination with the 200 kA AC and 20 kA DC interrupt ratings. Non-indicating construction means visual inspection or a separate monitoring scheme is needed to confirm fuse status after a fault event.

How it compares

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Price $64.99
Pricier than about 57% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

How do I install the PVS-R-35 fuse in a 600 V DC photovoltaic combiner box, and what step is often missed?

Insert the 5-1/2 in cylindrical body into a Class RK5 rejection holder until it seats fully; the step often missed is verifying the holder is rated for 600 V DC and 20 kA interrupt before closing the circuit.

What maintenance or replacement will the PVS-R-35 need over its service life?

The non-indicating, single-element design requires no routine maintenance; replace the fuse only after it interrupts a fault, confirmed by a continuity test on the 35 A element.

At what sustained current does the PVS-R-35 reach its thermal limit and open?

The fast-acting element opens at 35 A continuous rating; it will clear an overload at that level before the fiberglass body reaches its temperature limit.

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