Allen-Bradley PowerFlex 4 / 400: Replacement & Cross-Reference

The Allen-Bradley PowerFlex 4 (22A) and PowerFlex 400 (22C) are discontinued AC drives in the retired PowerFlex 4-class family. The modern replacements are the PowerFlex 523 and 525 by rating; the 400's fan/pump duty maps to PowerFlex 525, or a 750-series where features require. Edmundson Industrial sources new-surplus, used-tested, and reconditioned PowerFlex 4 and 400 drives as drop-ins.

Status

Brand	Allen-Bradley / Rockwell Automation
Family	PowerFlex 4 (22A), PowerFlex 400 (22C)
Class	Micro / standard AC drive: PowerFlex 4-class family (4, 40, 40P, 400)
Lifecycle	Discontinued / end-of-life: verify current Rockwell status at quote
Configuration	Integral keypad · legacy DriveTools / Connected Components Workbench

Cross-Reference

If you have (obsolete)	Recommended path	Notes
PowerFlex 4 (22A-…)	PowerFlex 523 / 525	Rebuild parameters; confirm voltage class, current rating, and frame/enclosure.
PowerFlex 400 (22C-…) fan / pump	PowerFlex 525	Confirm HP, control mode, and communication option.
With comm card (22-COMM-…)	PowerFlex 525 (embedded EtherNet/IP)	Older network options need a network-level plan, not just a drive swap.
Keep the machine running as-is	New-surplus / used-tested PowerFlex 4 / 400 (we source)	True drop-in. Match the full 22A / 22C catalog string.

Confirm voltage class, output current, enclosure, and any communication option against your nameplate before substituting. Send the full catalog string and we'll verify the match.

Key Specs

Micro / standard AC drives for fans, pumps, conveyors, and packaging
100–120V, 200–240V, 380–480V, and 500–600V classes by catalog code
Compact panel-mount frames; integral keypad and potentiometer
Optional 22-COMM communication cards for plant networks
Catalog string (22A- / 22C-…) encodes voltage, current, and enclosure: quote from the full string

Is the PowerFlex 4 / 400 still made?

No. The PowerFlex 4-class family is discontinued. Because these small drives sit on so many OEM machines, replacement demand is steady and current surplus availability changes. If a failed 4 or 400 stops a line, the practical move is a surplus drop-in now and a planned PowerFlex 525 migration later.

FAQ

Are the PowerFlex 4 and 400 discontinued?

Yes: Rockwell has retired the PowerFlex 4-class family. Units are available through surplus channels like Edmundson Industrial.

What replaces a PowerFlex 4 or 400?

PowerFlex 523 or 525 by rating; the 400's fan/pump duty maps to the 525. Parameters must be rebuilt and dimensions confirmed before the swap.

Can I buy a new PowerFlex 4 or 400?

New-surplus units still exist. We supply new-surplus, used-tested, and reconditioned PowerFlex 4 and 400 drives: a way to keep the installed footprint while a migration is planned.

Will a PowerFlex 525 drop into a PowerFlex 4 footprint?

Often close, but confirm frame and mounting. Our fabrication side makes adapter and filler hardware where the footprint changed.

What do you need to quote?

The complete 22A or 22C catalog string (or a nameplate photo), acceptable condition, and your need-by date.

Availability & Quote

Condition disclosed before sale, new-surplus, used-tested, or reconditioned, with photos on request.

Request a Quote

or send the catalog string to sales@edmundsonindustrial.com · (832) 975-8827 · Houston, TX. Response timing is confirmed with the request.

Related Allen-Bradley legacy pages

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