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Burndy KK3A36U-4N Aluminum Terminal Lug Connector, 4-Hole
The Burndy KK3A36U-4N is an aluminum terminal lug connector engineered to terminate 2 AWG-600 kcmil aluminum or copper stranded conductors. Built with a 4-hole pad configuration for 3 conductors and finished with tin plating for corrosion resistance, this connector is UL Listed and CSA Certified to UL468A-468B standards for demanding commercial and industrial electrical work.
Key Features
- Wire Range: Accepts 2 AWG-600 kcmil aluminum and copper stranded conductors for flexible use across circuit sizes.
- Durable Construction: Aluminum body construction with a tin-plated finish for reliable, long-lasting conductivity and corrosion resistance.
- Multi-Conductor Capacity: Terminates 3 conductors through a 4-hole pad for compact, high-density connections.
- Bolt Hole Size: 0.56" bolt holes sized to accept standard mounting hardware.
- Pad Dimensions: 4.22" pad width, 5.5" overall length, and 0.38" thickness for a rigid, secure termination point.
- Installation Torque: Rated to 375 in-lb installation torque for a properly seated mechanical and electrical connection.
Certifications & Compliance
- UL Listed
- CSA Certified
- Meets UL468A-468B Industry Standards
- RoHS Compatible (Exempt)
Technical Specifications
- Aluminum Size Range: 2 AWG-600 kcmil
- Copper Stranded Range: 2 AWG-600 kcmil
- Bolt Hole Size In: 0.56
- Connector Type: Terminal
- CSA Certified: Y
- cULus: N
- D In: 3
- E In: 1.75
- Industry Standards: UL468A-468B
- Installation Torque: 375
- Length In: 5.5
- N In: 0.63
- Number Of Conductors: 3
- Number Of Holes: 4
- Pad Width In: 4.22
- Plated: Y
- Product Material: Aluminum
- Rated For Direct Burial: N
- RoHS Compatible: Exempt
- Thickness: 0.38
- Type Of Plating: Tin
- UL Listed: Y
- UL Recognized: N
- Width In: 4.22
Typical Applications
- Industrial and Commercial Power Distribution
- Aluminum and Copper Conductor Terminations
- Switchgear and Panelboard Connections
- Multi-Conductor Circuit Terminations
- Indoor Electrical Installations
Why Burndy?
Burndy is a recognized name in electrical connectors, and the KK3A36U-4N reflects that standard with aluminum construction, tin plating, and UL Listed, CSA Certified performance built to UL468A-468B. Choose Burndy for dependable, code-compliant terminations on aluminum and copper conductor installations.
Manufacturer Resources
Product Specs
- Aluminum Size (Range):
- 2 AWG-600 kcmil
- Bolt Hole Size:
- 16-Sep
- Bolt Hole Size (in):
- 0.56
- Connector Type:
- Terminal
- Copper Stranded (Range):
- 2 AWG-600 kcmil
- CSA Certified:
- Y
- CULUS:
- N
- D - in:
- 3
- E - in:
- 1.75
- Industry Standard(s):
- UL468A-468B
- Installation Torque:
- 375
- Length (in):
- 5.5
- N (in):
- 0.63
- Number Of Conductors:
- 3
- Number Of Holes:
- 4
- Pad Width (in):
- 4.22
- Plated (Yes or No):
- Y
- Rated for Direct Burial:
- N
- ROHS Compatible:
- Exempt
- Thickness:
- 0.38
- Type of Plating:
- Tin
- UL Listed:
- Y
- Ul Recognized:
- N
- Width (in):
- 4.22
- Product Type:
- Mechanical Lug
- AWG:
- 2 AWG-600 kcmil
- Product Group:
- Wire Connectors & Terminals
- Department:
- Electrical
- Product Subgroup:
- Lugs & Terminals
- Product Material:
- Aluminum
Burndy KK3A36U-4N – Frequently Asked Questions
1) Will the Burndy KK3A36U-4N accept aluminum and copper conductors, or aluminum only?
Both. The KK3A36U-4N is rated for 2 AWG through 600 kcmil aluminum and the same 2 AWG through 600 kcmil range in stranded copper, so it is a dual-rated (AL9CU style) termination for either conductor metal. The body itself is aluminum with a tin-plated finish, which is what makes the copper connection acceptable without galvanic issues at the barrel.
2) How many cables does the KK3A36U-4N terminal lug take, and how many bolt holes are in the pad?
Three conductors land in the KK3A36U-4N, and the pad carries four bolt holes. That is a multi-barrel lug for pulling three runs of the same phase into one bus connection, not a single-conductor lug. If you only have one or two cables per phase, a smaller one- or two-barrel lug is the cheaper and more compact choice.
3) What bolt size fits the pad holes on this Burndy 4-hole lug?
The pad holes measure 0.56 inch (9/16), which is the standard clearance hole for 1/2 inch bus hardware. Bring 1/2 inch bolts, Belleville or flat washers and nuts to suit your bus bar thickness; no mounting hardware is part of the lug itself.
4) Will a 4-hole lug pad this wide fit my switchgear bus?
Check the pad footprint before you order: 4.22 inches across the pad, 5.5 inches overall length, and 0.38 inch pad thickness. The published hole spacing dimensions are 3 inches (D) and 1.75 inches (E), with an N dimension of 0.63 inch. On tight panelboard gutters or narrow vertical bus, a 4.22 inch pad often will not clear adjacent phases, and a two-hole lug is the better fit.
5) What torque do I tighten the set screws to on the KK3A36U-4N?
375 in-lb is the rated installation torque for the conductor screws on this lug. Use a torque wrench or a torque screwdriver rated to that value; under-torquing an aluminum termination is the usual cause of a hot connection, and over-torquing can strip the barrel. Torque figures for the pad bolts come from the bus or gear manufacturer, not the lug.
6) Can I use this Burndy lug in a direct burial or underground pull box?
No. The KK3A36U-4N is not rated for direct burial. It is an indoor, enclosed-equipment termination for switchgear, panelboards and power distribution. For buried or submerged connections you need a lug or splice specifically listed for direct burial or wet locations.
7) Is the Burndy KK3A36U-4N UL Listed for an inspected commercial job?
It is UL Listed and CSA Certified, built to UL468A-468B industry standards for wire connectors. That covers the usual inspection questions on commercial and industrial terminations in both the US and Canada. The part is also RoHS compatible under exemption.
8) Why does a tin-plated aluminum lug matter for a copper feeder termination?
The tin plating over the aluminum body is what keeps the connection stable where dissimilar metals meet, both at the copper conductor in the barrel and at a copper or plated bus pad. It also slows corrosion in humid industrial rooms. Aluminum conductors still want the usual joint compound per your spec; the plating handles the lug side.
9) What is the exact part number to order this Burndy 4-hole terminal lug?
Order Burndy KK3A36U-4N. That single designation covers the 3-conductor, 4-hole tin-plated aluminum terminal lug rated 2 AWG to 600 kcmil; there are no finish or size options to specify with it.
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Does the Burndy KK3A36U-4N come with a warranty?
Absolutely. The Burndy KK3A36U-4N is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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