Delta MS300 IP66 Variable Frequency Drives
Compare Delta MS300 IP66 enclosed drives by input supply and built-in EMC filter configuration. Find the complete model code below and check the installation requirements before selection.
- VFD2A8MS21MFSAA
- VFD2A8MS21MNSAA
- VFD9A0MS43MFSAA
- VFD9A0MS43MNSAA
These Delta MS300 IP66 variable frequency drives combine an enclosed design with two input-supply choices in the model selection below. Use the complete ordering code to distinguish the supply and built-in EMC filter configuration, especially when replacing an existing drive.
MS300 IP66 model reference
The four models listed here belong to the IP66 standard-model range. Delta identifies the enclosure category as IP66 / NEMA 4X. The table is a reference for this page’s ordering codes, not the complete MS300 IP66 range.
| Complete model | Input supply | Catalog motor capacity, kW | Catalog rated output current, A | Built-in EMC filter |
|---|---|---|---|---|
| VFD2A8MS21MFSAA | 230 V class, single-phase | 0.4 | 2.8 | Yes |
| VFD2A8MS21MNSAA | 230 V class, single-phase | 0.4 | 2.8 | No |
| VFD9A0MS43MFSAA | 460 V class, three-phase | 3.7 | 9.0 | Yes |
| VFD9A0MS43MNSAA | 460 V class, three-phase | 3.7 | 9.0 | No |
Motor capacity is the catalog reference value, not a substitute for matching the motor current, duty and operating conditions. The ordering-table rated output currents shown are 2.8 A and 9 A; consult the applicable specifications for the selected duty and any derating.
Which filter configuration do you need?
For 230 V single-phase input, VFD2A8MS21MFSAA includes a built-in EMC filter; VFD2A8MS21MNSAA does not. Both appear under the same 0.4 kW catalog capacity.
For 460 V three-phase input, VFD9A0MS43MFSAA includes a built-in EMC filter; VFD9A0MS43MNSAA does not. Both are listed at 3.7 kW. Keep the full code when requesting a quote; an identical power rating does not establish interchangeability.
Check the installation, not just the IP rating
IP66 is an enclosure rating, not approval for every installation environment. The referenced Delta catalog specifies indoor installation. Check the location and exposure conditions before choosing the drive rather than treating an IP66 label as unrestricted outdoor suitability.
- Identify the site supply voltage and phase count before comparing motor power.
- Check the motor nameplate current, load duty, ambient temperature and altitude against the applicable drive documentation.
- Confirm filter requirements for the installation. A built-in filter alone does not establish compliance for the complete machine.
- Review the exact enclosure dimensions, cable-entry arrangements and sealing requirements before mounting or replacing the drive. Do not assume the layout matches an open-type MS300.

Delta MS300 hardware design diagram with component callouts
For an inquiry, provide the complete model, quantity and destination. For replacement work, a photo of the existing drive nameplate and its installation helps identify the configuration that needs checking.
See the official Delta MS300 catalog, particularly the IP66 specifications, dimensions and ordering table. Use the applicable IP66 user manual for installation and commissioning.