Delta · Built-in brake choppers for the entire series
VFD185C43A-21 is a Delta VFD Drive. It is used in pump sets, conveyor belts, fan and compressor drives where the installed unit is matched to the original catalog number and a compact, documented part is required.
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Rated operational voltage3-phase 400 V AC
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Overload capacity150% for 60 s
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Enclosure ratingIP20 (IEC 60529)
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Frequency50/60 Hz (IEC 61800-2)
Specifications
| Electrical |
| Rated operational voltage |
3-phase 400 V AC |
| Supply voltage |
1-phase 200...240 V / 3-phase 380...480 V AC |
| Frequency |
50/60 Hz (IEC 61800-2) |
| Control method |
V/f, sensorless vector (IEC 61800-2) |
| Overload capacity |
150% for 60 s |
| Rated speed |
One high speed pulse input terminal MI7 built-in with maximum speed up to 33kHz |
| Mechanical |
| Mounting |
Cabinet / DIN rail |
| Enclosure rating |
IP20 (IEC 60529) |
| Environment and compliance |
| Operating temperature |
0...+40 °C (IEC 60068-2-1) |
| Certifications |
CE, UL, cULus |
Product type and series follow the official Delta download-centre catalogue search for this model which lists VFD185C43A-21 under the Delta product line; the product type published for this catalog number is "VFD Drive". Source: https://downloadcenter.deltaww.com/en-US/DownloadCenter?q=VFD185C43A-21. Numeric ratings in the table above are the values carried on this page and must be confirmed against the original Delta manufacturer datasheet before they are treated as this catalog number's ratings; they are not estimated here.
Model comparison in the same family
| Delta Built-in brake choppers for the entire series variants |
| Catalog number |
Overload capacity |
Rated operational voltage |
Frequency |
|
VFD185C43A-21 (this page) |
150% for 60 s |
3-phase 400 V AC |
50/60 Hz (IEC 61800-2) |
VFD185CP43B-21
| 3-phase 400 V AC |
50/60 Hz (IEC 61800-2) |
VFD1850C43A-00
| 3-phase 400 V AC |
50/60 Hz (IEC 61800-2) |
VFD1850C43A-21
| 3-phase 400 V AC |
50/60 Hz (IEC 61800-2) |
Before selecting an alternative, confirm its dimensions, terminals and installation requirements in the manufacturer documentation.
Where it sits in the control system
The VFD185C43A-21 is the drive element in a Delta motor installation. It supplies the motor with controlled power and carries the output frequency and overload behaviour, so the motor and the supply conductor are sized to the ratings stated in the manufacturer documentation, not to a generic assumption.
Typical installations place it in pump sets, conveyor belts, fan and compressor drives, where the unit is matched to the original catalog number and the enclosure provides Cabinet / DIN rail support. Record the catalog number and revision from the nameplate of the installed unit before specifying a like-for-like spare.
Selection notes for Delta VFD185C43A-21
Delta VFD185C43A-21 — Variable frequency drive for motor speed and torque control in pumps, fans, conveyors and general industrial machinery. The figures below are taken from the specification table on this page for catalog number VFD185C43A-21; always cross-check the catalog number and hardware revision on the nameplate before placing an order.
- Rated speed: One high speed pulse input terminal MI7 built-in with maximum speed up to 33kHz — Check this value against the nameplate of the installed unit before ordering.
- Supply voltage: 1-phase 200...240 V / 3-phase 380...480 V AC — Match it to the existing panel and upstream protection.
- Mounting: Cabinet / DIN rail — Record it with the other nameplate data when sourcing a replacement.
- Rated operational voltage: 3-phase 400 V AC — Confirm the revision of the installed unit before a like-for-like replacement.
Cross-check the ratings above with the installed device before confirming the order.
Common questions about VFD185C43A-21
Q.Which official Delta document defines VFD185C43A-21?
The official Delta download-centre catalogue search for this model lists VFD185C43A-21 under the Delta product line, and the product type published for this catalog number is "VFD Drive". The document and its official catalogue record are publicly retrievable at https://downloadcenter.deltaww.com/en-US/DownloadCenter?q=VFD185C43A-21. Use that document as the authority for ratings and installation conditions before ordering.
Q.For VFD185C43A-21, what does the specification table state about rated operational voltage?
The specification table lists rated operational voltage = 3-phase 400 V AC for Delta VFD185C43A-21. Use the value as the reference when sourcing a current-production equivalent.
Q.Which value is published under overload capacity for catalog number VFD185C43A-21?
For VFD185C43A-21, overload capacity is given as 150% for 60 s. Check the revision of the installed unit if the catalog number has been superseded.
Q.Before ordering VFD185C43A-21, which certifications entry should be checked?
The certifications entry quoted above is CE, UL, cULus. Compare it with the nameplate of the installed unit before ordering.
Q.How do I confirm compatibility of VFD185C43A-21 before ordering?
Match the catalog number VFD185C43A-21 and the specification values listed above against the installed unit, then confirm the firmware or hardware revision where a revision-sensitive part is involved.
Q.What should I include in an enquiry for VFD185C43A-21?
Send the full catalog number VFD185C43A-21, the required quantity and a photo of the nameplate. Stock, lead time and the applicable compliance documents can then be confirmed for Delta VFD185C43A-21.