Burndy ASA250U Terminal Stacki...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$15.44
Burndy ASA250U Terminal Stacking Adapter, Al/Cu, 2-Slot, 250 kcmil

Burndy ASA250U Terminal Stacking Adapter, Al/Cu, 2-Slot, 250 kcmil

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Model: ASA250U

In Stock (leaves warehouse same day if ordered before 3pm ET)

$15.44
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Burndy ASA250U Terminal Stacking Adapter, Al/Cu, 2-Slot, 250 kcmil

The Burndy ASA250U Terminal Stacking Adapter is a dual-rated Al/Cu accessory that lets electricians and panel builders stack additional copper or aluminum terminals onto a single connection point without re-terminating the existing conductor. This 2-slot adapter is designed for use with 2-hole or 4-hole copper or aluminum terminals, is rated for conductors up to 250 kcmil, and accommodates a maximum insulation outer diameter of .87". Because it is dual-rated for both aluminum and copper, the ASA250U gives installers flexibility to match whatever terminal and conductor combination a job calls for. It is a practical solution for adding terminal capacity at a lug, bus, or connection point while keeping the original termination intact.

Key Features

  • Max Conductor Rating: Rated for conductors up to 250 kcmil, supporting high-capacity power terminations.
  • Dual Al/Cu Rating: Dual-rated for use with either aluminum or copper conductors and terminals, adding installation flexibility on mixed-metal jobs.
  • 2-Slot Stacking Design: The 2-slot body allows an additional terminal to be stacked at an existing connection point instead of requiring a new termination.
  • 2-Hole or 4-Hole Terminal Compatibility: Works with 2-hole or 4-hole copper or aluminum terminals for broad compatibility with standard lugs.
  • Insulation Clearance: Maximum insulation outer diameter of .87" for compatibility with a range of insulated conductor sizes.
  • Tin-Plated Construction: Tin-plated for corrosion resistance and dependable, long-term electrical contact at the connection point.

Technical Specifications

  • Product Type: Mechanical
  • Rating: Dual Rated for Al/Cu
  • Max Conductor: 250 kcmil
  • Insulation OD: .87"
  • Terminal Compatibility: 2-Hole or 4-Hole Copper or Aluminum Terminals
  • Slots: 2-Slot

Typical Applications

  • Aluminum and Copper Conductor Terminations
  • Panelboard and Switchboard Connections
  • Stacking Additional Terminals at Bus Bar and Lug Connections
  • Commercial and Industrial Electrical Installations
  • Electrical Maintenance, Retrofit, and Upgrade Terminations
  • New Construction Panel and Switchgear Wiring

Why Burndy?

Burndy is a trusted name in electrical power connectors, and the ASA250U Terminal Stacking Adapter reflects that standard with its dual Al/Cu rating and tin-plated construction for dependable, corrosion-resistant connections. Its 2-slot design and 2-hole or 4-hole terminal compatibility make it a versatile addition to any electrician's or panel builder's toolkit for adding terminal capacity without compromising the original termination. Electricians and panel builders can rely on Burndy stacking adapters to help keep power connections secure, code-compliant, and built for long-term reliability.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
BURNDY-20260915
Product Type:
Lug Adapter
Department:
Electrical
Product Subgroup:
Lugs & Terminals
Product Group:
Wire Connectors & Terminals

Burndy ASA250U – Frequently Asked Questions

1) What does a Burndy ASA250U stacking adapter actually do at a lug connection?
The ASA250U lets you add a terminal at an existing connection point without cutting and re-terminating the conductor already landed there. It is a 2-slot adapter body that accepts a second copper or aluminum terminal at a lug, bus bar, or panel connection, so the original termination stays intact. Typical use is adding circuit capacity during a panelboard or switchboard retrofit.
2) Can I use the ASA250U with aluminum conductors, or copper only?
Both. The ASA250U is dual-rated Al/Cu, so it can be used with aluminum or copper conductors and terminals. That matters on mixed-metal work where the existing feeder is aluminum and the added terminal is copper, or the reverse.
3) What is the largest conductor the Burndy ASA250U will handle?
Conductors up to 250 kcmil. If the feeder at that connection point is larger than 250 kcmil, this adapter is not the right part and you need a higher-rated stacking adapter in the Burndy ASA series.
4) My conductor has thick insulation. Will it clear the ASA250U?
The adapter accommodates a maximum insulation outer diameter of .87 inch. Measure the OD over the jacket, not the conductor. Heavy-wall or double-jacketed cable at 250 kcmil can exceed .87 inch even when the copper itself is within rating, and in that case the cable will not seat properly.
5) Does the ASA250U work with 4-hole terminals or only 2-hole?
Either. It is listed for use with 2-hole or 4-hole copper or aluminum terminals, which covers standard NEMA-pattern compression and mechanical lugs. The adapter itself is a 2-slot body.
6) What is the exact part number to order for a Burndy 250 kcmil stacking adapter?
Order Burndy ASA250U. That is the manufacturer part number and the only model on the item, so there are no finish or size options to specify.
7) Where would an electrician typically use a stacking adapter like this instead of pulling a new termination?
Panelboard and switchboard connections, bus bar and lug landings, and retrofit or upgrade work where a feeder is already terminated and you need one more conductor on the same point. It also comes up in new construction panel and switchgear wiring where the gear has fewer landing points than the design calls for.
8) Is the Burndy ASA250U plated for corrosion resistance in a damp electrical room?
It is tin-plated, which is there for corrosion resistance and stable long-term contact at the connection interface. Tin plating is the usual choice on dual-rated Al/Cu connectors because it keeps an aluminum-to-copper joint from galvanic attack at the contact face.
9) Is this a mechanical connector or a compression fitting?
Mechanical. The ASA250U is a mechanical-type adapter, so no die set or crimp tool is needed for the adapter itself. The terminals you stack onto it may still be compression lugs, which you would crimp before landing them.
How fast can I get the Burndy ASA250U delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Burndy ASA250U come with a warranty?
Absolutely. The Burndy ASA250U is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Burndy ASA250U?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Burndy ASA250U from ZenSupply?
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