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Copper compression lug, tin finish, one 3/4 inch stud hole, long barrel

Burndy

Burndy YAD31M20E34 One-Hole Compression Lug 300 kcmil 3/4 in Stud Long

SKU CH-7HE2-79X0H

One-hole compression lug accepts 300 to 350 kcmil copper wire, features a 3/4 inch stud, long brazed barrel, tin-plated finish and meets UL 467 at 600 V

  • TypeElectrical Connectors
  • Handles up to 350 kcmil conductors for heavy-duty power circuits
  • Long 1.1 in barrel with brazed seam ensures strong crimp joints
  • Tin-plated copper contact resists corrosion in harsh environments
  • Rated 600 V and 302 °F for demanding industrial use
  • UL 467 listed for grounding and bonding compliance

Burndy 300 kcmil Long-Barrel Compression Lug

This Burndy YAD31M20E34 is a single-hole copper compression lug rated for 600 volts and a maximum operating temperature of 302 degrees F. The long, brazed barrel accepts wire from 300 kcmil up to 350 kcmil and terminates on a 3/4 inch stud. Tin plating protects the contact surfaces.

Installers needing 300 to 350 kcmil copper crimp

The lug suits electricians and panel builders terminating large copper conductors in switchgear, motor leads or grounding applications where a long barrel and 3/4 inch stud match the bus geometry. It will not suit projects requiring smaller wire ranges, dual-hole mounting, insulated barrels or aluminium conductor compatibility.

300–350 kcmil wire range with long barrel

The decisive specification is the combination of a 300 kcmil minimum and 350 kcmil maximum wire size served by a 1.1 inch long brazed barrel. This range and barrel length determine whether the lug fits the conductor and the available enclosure space.

Highlights

  • Handles up to 350 kcmil conductors for heavy-duty power circuits
  • Long 1.1 in barrel with brazed seam ensures strong crimp joints
  • Tin-plated copper contact resists corrosion in harsh environments
  • Rated 600 V and 302 °F for demanding industrial use
  • UL 467 listed for grounding and bonding compliance

Specifications

BrandBURNDY
TypeElectrical Connectors

Questions about this item

How do I install the YAD31M20E34 lug on a 300 kcmil conductor, and what is the common crimping mistake?

Strip the insulation to match the 1.1 in barrel length, insert the conductor fully into the brazed barrel, and use a UL-listed die for 300–350 kcmil; the frequent error is under-crimping because the long barrel requires more compression cycles than a standard barrel.

What maintenance or replacement will the tin-plated copper lug need over time?

Inspect the tin finish periodically for oxidation or discoloration, especially in high-temperature environments up to 302 Degrees F, and re-torque the 3/4 in stud hardware if vibration loosens the connection; replace the lug if the barrel shows cracking or the plating is worn through.

What is the first limit reached when the lug runs continuously at its 600 V rating?

The 302 Degrees F maximum operating temperature is the limiting factor; sustained current that raises the copper barrel above this temperature degrades the tin plating and can weaken the brazed seam before the voltage insulation limit is approached.

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