| Delta VFD-B Drives: Identify Models for Replacement Inquiries
Planning a VFD-B replacement? Identify your original model and frame, then separate an exact-model purchasing request from a change to another drive series.
- VFD007B21A
- VFD007B23A
- VFD007B43A
- VFD015B21A
- VFD022B21A
- VFD022B43B
- VFD037B23A
- VFD055B23A
- VFD075B43A
- VFD150B43A
- VFD220B43A
- VFD550B43C
Delta now identifies the VFD-B series as discontinued and names MS300, MH300 and C2000 Plus as replacement series on its official VFD-B product page. That is series-level guidance: it does not identify a directly interchangeable successor for each VFD-B ordering code.
WOOLARS accepts VFD-B purchasing inquiries. Start by deciding whether you need the original model or want to evaluate a different drive series. Those requests need different quotation scopes.
Two different meanings of “VFD-B replacement”
| Your objective | What the request should establish |
|---|---|
| Source the same ordering code | Identify the original drive. Product condition, availability and the supplied configuration must be confirmed in the quotation. |
| Move to another drive series | Compare the proposed drive with the machine’s electrical, control and installation requirements before accepting it. |
A manufacturer’s successor-series listing helps define where to investigate. It does not confirm terminal correspondence, parameter transfer, mounting fit or compatibility with existing accessories.
Original VFD-B model and frame references
The following 23 ordering codes are covered on this page. The frame column points to the mechanical drawing in the legacy manual, helping distinguish configurations before a replacement is discussed.
Frames A, A1, A2 and B
| Complete model | Legacy manual frame |
|---|---|
| VFD007B21A | A1 |
| VFD007B23A | A |
| VFD007B43A | A |
| VFD015B21A | A1 |
| VFD015B43A | A1 |
| VFD022B21A | B |
| VFD022B23A | B |
| VFD022B43B | A2 |
| VFD037B23A | B |
| VFD037B43A | B |
Frames C, D, E and E1
| Complete model | Legacy manual frame |
|---|---|
| VFD055B23A | C |
| VFD055B43A | C |
| VFD075B23A | C |
| VFD075B43A | C |
| VFD110B23A | C |
| VFD110B43A | C |
| VFD150B43A | D |
| VFD185B43A | D |
| VFD220B43A | D |
| VFD300B43A | E |
| VFD370B43A | E |
| VFD450B43A | E |
| VFD550B43C | E1 |
Source: Delta-authored VFD-B User Manual, revision July 2008, BE16, SW V4.08 & V5.00, section 1.1 and section 2.3. A third-party-hosted copy of this legacy manual is available for reference; use the version applicable to the installed drive.
Use the suffix and drawing together
VFD007B43A belongs to frame A, while VFD022B43B belongs to A2 in that manual. VFD022B21A and VFD022B23A belong to frame B. These examples show why neither the shared “022” prefix nor the final letter alone is a sufficient mounting reference.
For Delta VFD-B dimensions, open the drawing identified by the complete model in section 2.3. Check the mounting pattern, enclosure depth and cable entry as well as the outer width and height. A cross-series migration needs the proposed drive’s own drawing.
What must remain functional after migration?
Define the machine functions that the new configuration must preserve: the motor’s required operating range, run and speed commands, fault/run feedback, network exchanges and any fitted braking or feedback hardware. Compare the actual functions used by the machine rather than assuming that two series with similar power ranges behave identically.
For instance, an existing PLC’s command/status mapping and the drive’s terminal assignments need explicit review. A parameter number or terminal label from the old manual should not be copied into another series without checking its documentation.
Manual access and purchasing scope
Delta’s VFD-B download center is the manufacturer’s entry point for manuals and drawings. The legacy copy linked above documents the original equipment; it is not a migration guide for MS300, MH300 or C2000 Plus.
Tell WOOLARS which route you need: an inquiry for the original VFD-B code, or a quotation request that separately identifies a proposed alternative. Include the model and quantity; for a migration, attach the existing nameplate and the machine requirements that must be preserved. Availability and any alternative configuration are subject to confirmation.