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Ceramic square tube fuse 300A 500/690V gG

OEM Industries

OEM Industries NT3 RT16-3 NH3 RT20-3 RO34 300A 500/690V line protection

SKU CH-K7WV-TA7G4

Ceramic square tube fuse rated 300A gG at 500/690V for line protection

  • Amperage300
  • Product typeCircuit Protectors
  • 300 A gG rating protects circuits against overloads
  • 500/690 V ceramic square tube handles high-voltage lines
  • NT3 RT16-3 NH3 RT20-3 RO34 series fits standard fuse holders
  • Ceramic body resists heat during fault conditions
  • New component ensures reliable line protection

Circuit protector for 300 A circuits

This ceramic square-tube fuse provides line protection in industrial and generator applications. It is rated for 300 amps at 500/690 volts and carries a gG characteristic. The NT3 RT16-3 NH3 RT20-3 RO34 series fits compatible fuse holders in electrical supply systems.

Rated current and voltage define fit

The single specification that decides compatibility is the 300 A rating combined with the 500/690 V rating. Only circuits designed for these exact values should use this device. The gG time-current curve and ceramic body are built to match that electrical envelope.

Suits installers protecting 300 A lines

Electricians and maintenance teams protecting 300 A feeders at 500/690 V will find this fuse appropriate. Buyers who need a different current rating, a different voltage class or a non-gG characteristic should look at other parts.

How it compares

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

Price $66.99
Pricier than about 58% 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
Amperage300

Questions about this item

What does the 300 A rating mean once the fuse is installed?

It means the fuse will carry 300 A continuously and open the circuit if current exceeds that value, protecting downstream equipment.

What does the 500/690 V marking cap in practice?

The fuse is rated for 500 V AC and 690 V AC systems, so it safely interrupts faults up to those voltages.

What physical format does the ceramic square tube need to fit?

It follows the NH3 RT20-3 RO34 size, so it mounts in standard NH3 fuse bases or holders.

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