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Cross-Reference · Allen-Bradley

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

BrandAllen-Bradley / Rockwell Automation
FamilyPowerFlex 4 (22A), PowerFlex 400 (22C)
ClassMicro / standard AC drive — PowerFlex 4-class family (4, 40, 40P, 400)
LifecycleDiscontinued / end-of-life — verify current Rockwell status at quote
ConfigurationIntegral keypad · legacy DriveTools / Connected Components Workbench

Cross-Reference

If you have (obsolete)Recommended pathNotes
PowerFlex 4 (22A-…)PowerFlex 523 / 525Rebuild parameters; confirm voltage class, current rating, and frame/enclosure.
PowerFlex 400 (22C-…) fan / pumpPowerFlex 525Confirm 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-isNew-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

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 surplus stock moves quickly. 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 — usually the fastest way to restart a stopped machine.
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 always 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. Same-day response on most requests.

Related Allen-Bradley legacy pages

Send us your catalog number.

Condition disclosed before sale. Same-day response on most requests.

Request a Quote