Older Square D MCCs such as Model 5, Model 4, and Model 3 are still used in many industrial plants, commercial buildings, manufacturing facilities, water treatment sites, and institutional facilities. These MCC lineups may still operate reliably, but replacement buckets can be difficult to source when a starter, breaker, feeder, or fusible unit fails.

Ampstate supplies replacement MCC buckets, rebuilt MCC buckets, feeder buckets, starter buckets, breaker buckets, fusible buckets, and custom replacement solutions for older Square D MCC equipment.

Common Search Terms

Customers may search for these products using different terms, including:

• Square D Model 5 MCC bucket
• Square D Model 4 MCC bucket
• Square D Model 3 MCC bucket
• Square D MCC bucket replacement
• Square D starter bucket replacement
• Square D feeder bucket replacement
• Square D breaker bucket replacement
• Square D fusible bucket replacement
• Old Square D MCC bucket
• Obsolete Square D MCC bucket

Why Older Square D MCC Buckets Need Careful Review

Older MCC buckets are not universal. A Model 6 bucket should not be assumed to fit a Model 5, Model 4, or Model 3 lineup. The bucket height, rear stab design, mounting method, door mechanism, disconnect handle, and internal layout must all be checked.

Even two buckets with the same amperage may not be interchangeable if the MCC series or structure design is different.

What Information Is Needed?

To quote a replacement, send:

• MCC nameplate photo
• Existing bucket photo
• Inside bucket photo
• Rear stab photo
• Bucket height
• MCC model or series
• Voltage rating
• Amp rating
• Starter size
• Motor horsepower
• Breaker or fuse information
• Control voltage
• Overload range
• Quantity required

If the original bucket is missing, photos of the empty MCC compartment and vertical bus area are helpful.

Replacement and Rebuild Options

For older Square D Model 5, Model 4, and Model 3 MCCs, replacement options may include tested used buckets, refurbished units, rebuilt buckets, or custom-built replacements. In some cases, the existing bucket shell can be reused and rebuilt with updated electrical components.

This may include a replacement breaker, disconnect switch, contactor, overload relay, control transformer, terminal blocks, pilot devices, and wiring.

Square D MCC Bucket Support from Ampstate

Ampstate helps customers source and review replacement buckets for Square D Model 6, Model 5, Model 4, Model 3, and other MCC systems.

For fast support, send photos, voltage, amperage, bucket size, and nameplate details.