BA-81 - Square D Contact Kit

BA-81 - Square D Contact Kit

If you're dealing with an older Square D Size 0 "old-style" Series A contactor that's starting to wear out, this BA‑81 contact kit is exactly what you need. Instead of replacing the entire unit (which can be expensive and time-consuming), this OEM kit lets you bring your existing setup back to life—quickly and affordably. It's the same quality and exact fit you'd expect from Schneider Electric, so that you can fix it right the first time.

This kit comes fully loaded with three moving contacts, six stationary contacts, plus the springs and screws needed for a full install. All the contacts are made from a tough silver alloy that holds up well under load, resisting arc wear and sticking. Whether you're keeping an HVAC system running or repairing a motor starter panel, this is a no-fuss, reliable solution that gets the job done without cutting corners.

Key Features and Benefits

• Perfect fit, no surprises: Explicitly built for Square D Size 0 "old-style" Series A contactors—install it and you're good to go.
• Ready for three-phase jobs: Covers all three poles, making it ideal for complete motor control applications.
• Silver alloy contacts that last: Designed to resist arcing and welding so your equipment stays safe and runs longer.
• Everything you need, right in the box: Springs and screws included to save you the extra trip or search for parts.
• Get more life out of your equipment: A smart way to extend the use of older contactors without the cost of full replacement.

Technical Specs

• Model/Part Numbers: 9998‑BA‑81, 77460
• Fits: Square D Size 0, Old-Style Series A contactors
• Poles: 3 (three-phase switching)
• Contact Materials: Weld-resistant silver alloy
• Voltage Rating: Typically rated for up to 600 VAC per pole
• Includes: 3 moving + 6 stationary contacts, springs, mounting screws

Built to Standard, Certified for Safety

• Manufactured to the same specs: as original Square D parts by Schneider Electric
• Complies with UL, CSA, and IEC: safety and performance standards
• Silver alloy construction: ensures reliable contact under load, reduces maintenance issues over time.

Where It Works Best

This kit is a go-to fix for electricians, service techs, and facility teams who work on:

• HVAC control systems
• Motor starter panels
• Industrial lighting controls
• General-purpose motor control circuits