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White ceramic square tube fuse with metal end caps and rating markings

OEM Industries

OEM Industries NT3 RT16-3 NH3 RT20-3 RO34 500A gG 500/690V ceramic square tube fuse line protection

SKU CH-VBJY-31DX6

A 500 A gG ceramic square-tube fuse rated for 500/690 V line protection

  • Amperage500
  • Product typeCircuit Protectors
  • Rated 500 A for high-current line protection
  • gG characteristic provides full-range overload and short-circuit defence
  • Ceramic square-tube body withstands 690 V operation
  • NT3 RT16-3 NH3 RT20-3 RO34 series fits standard industrial holders
  • New condition ensures reliable performance from installation

Line protection fuse

This OEM Industries ceramic square tube fuse provides line protection for industrial circuits. It is built to the NT3 RT16-3 NH3 RT20-3 RO34 series specification and rated at 500 amps. The gG characteristic suits general-purpose applications.

Suited for 500-amp industrial feeds

Installers protecting 500-amp circuits at up to 690 volts will find this fuse matches the required rating. It is not intended for lower-current branch circuits or for systems that demand a different breaking characteristic.

500-amp gG rating at 690 volts

The decisive specification is the 500-amp gG rating at 690 volts, which determines whether this fuse coordinates with your protection scheme. Verify the required current and voltage against this rating before fitting.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $63.99
Pricier than about 56% of the 1,135 comparable items (median $54.99).

Specifications

Product
Product lineNT3 RT16-3 NH3 RT20-3 RO34
Model nameNT3 RT16-3 NH3 RT20-3 RO34
Product typeCircuit Protectors
Power
Amperage500

Questions about this item

What size fuse holder or disconnect base does the 500 A ceramic square-tube fuse require?

The fuse is built to the NH3 RT16-3 RT20-3 RO34 series dimensions, so it fits standard NH3 fuse bases or disconnects rated for 500 A at 690 V.

Will the gG 500 A fuse coordinate with existing 16 A, 20 A or 34 A downstream breakers?

Yes, the gG characteristic provides full-range protection and will discriminate with smaller 16 A, 20 A or 34 A breakers on the same 500/690 V circuit.

How can I confirm the fuse is intact after installation?

Measure continuity across the ceramic tube with a multimeter; a low resistance reading shows the element is intact and the fuse is ready for service.

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