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White ceramic square tube fuse with metal end caps

OEM Industries

OEM Industries NT3 RT16-3 NH3 RT20-3 RO34 630A gG 500/690V ceramic square tube fuse line protection

SKU CH-PKYZ-GQD5N

A 630 A gG ceramic square-tube fuse rated for 500/690 V line protection

  • Amperage630
  • Product typeCircuit Protectors
  • High 630 A rating handles heavy industrial loads
  • gG class gives full-range overload and short-circuit protection
  • 500/690 V rating suits standard three-phase networks
  • Ceramic square tube body withstands high breaking energy
  • NT3 RT16-3 NH3 RT20-3 RO34 series matches common fuse holders

Industrial fuse for 630 A circuits

This ceramic square-tube fuse carries the NT3 RT16-3 NH3 RT20-3 RO34 series designation and is rated for 630 A at 500/690 V with a gG characteristic. It is intended for line protection in industrial power distribution and generator installations.

Direct fit into compatible NH3 fuse bases

Installation consists of inserting the fuse into a matching holder; the square ceramic tube aligns with standard NH3 clips. The main risk is using a holder rated for lower current or voltage, which can cause overheating or failure to clear a fault.

Suited for engineers specifying 630 A gG protection

This device fits applications that demand the exact 630 A rating and 500/690 V operating voltage. Buyers who need a different current rating, a different voltage class, or a non-gG time-current curve should look at other options.

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
Amperage630

Questions about this item

How can I confirm the fuse is operating correctly after installation?

The fuse is a gG-class ceramic square tube rated 630 A at 500/690 V; correct operation means the circuit remains live under normal load and the element melts only when current exceeds 630 A.

What is included in the package and what must be sourced separately?

The package contains the single NT3 RT16-3 NH3 RT20-3 RO34 ceramic fuse; fuse bases, holders or mounting hardware are not included and must be purchased separately.

Which version should I select for a 630 A line protection application?

Choose the NT3 RT16-3 NH3 RT20-3 RO34 model rated 630 A gG at 500/690 V; it is the only version listed for that current and voltage requirement.

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