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White ceramic square tube fuse with metal end caps

OEM Industries

OEM Industries NT3 RT16-3 NH3 RT20-3 RO34 250A gG 500/690V ceramic square tube fuse line protection

SKU CH-FK95-S1RSF

A 250 A gG ceramic square-tube fuse rated for 500/690 V line protection

  • Amperage250
  • Product typeCircuit Protectors
  • Reliable 250 A circuit protection for industrial systems
  • Rated 500/690 V for high-voltage line safety
  • gG class ensures full-range overload and short-circuit response
  • Ceramic square tube body withstands thermal and mechanical stress
  • NH3 RT20-3 series fits standard industrial fuse holders

Fuse specification and application

This ceramic square tube fuse is rated at 250 amps with a gG characteristic for general line protection. It operates at 500/690 volts and carries the series designation NT3 RT16-3 NH3 RT20-3 RO34. The component is supplied new and ready for installation.

Integration requirements and circuit benefits

The fuse fits holders designed for the NH3 RT20-3 form factor and the stated voltage rating. Its ceramic body provides high breaking capacity under short-circuit conditions. Selecting this device frees the circuit from sustained overcurrent damage while maintaining coordination with upstream protection.

Suitable users and limitations

This part suits engineers specifying 250 amp gG protection at 500/690 volts in industrial or utility panels. Buyers needing a different current rating, voltage class, or characteristic curve should look at other models. Installations requiring a non-ceramic body or alternative mounting style will not match this fuse.

How it compares

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

Price $60.99
Typical for this category: the median of 1,135 items is $54.99.

Specifications

Product
Product lineNT3 RT16-3 NH3 RT20-3 RO34
Model nameNT3 RT16-3 NH3 RT20-3 RO34
Product typeCircuit Protectors
Power
Amperage250

Questions about this item

At what current does the 250 A gG fuse element melt during a sustained overload?

The fuse is rated at 250 A and uses a gG characteristic, so the element will melt once the current exceeds that rating for the time defined by the gG curve.

How much heat does the ceramic square tube body dissipate when carrying 250 A continuously?

The ceramic square tube construction is designed to handle the thermal load at the full 250 A rating without exceeding the temperature limits of the gG class.

What fuse holder or base is required to mount the NT3 RT16-3 NH3 RT20-3 RO34 body?

The NH3 size and square tube profile require an NH3-compatible fuse base or holder that accepts the 500/690 V ceramic body.

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