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Do you have an older Micro-Speed® CX™ model that you are replacing/upgrading? Model numbers have changed since our software version 2.2 update. Use the charts below to find the direct replacement for your model, then click on the current product link for more details.
Why did the model numbers change?
All Micro-Speed® CX™ drives now include Version 2.2 updates, including I2T motor thermal protection. The I2T protection feature removes the need to have separate motor overload relays in your control panel. Prior to Version 2.2, the CX™ series did not have model numbers ending with the letter “R”. However, the CXR™ Version 2.2 is a direct replacement of previous CX™ models (versions 2.1 and earlier).
| Legacy Models* | HP (kW) | Max Amps (FLA) | Size Reduced?** | Replacement Models* (Click to view details) | Upgrade to this model if your previous model included a brake board (SSB1 or SSB2) |
|---|---|---|---|---|---|
| M123 |M123CX | 1 (0.75) | 4.3 A | Same (a2) | M123CXR | M123CXRP |
| M123H | M123CXH | 1 (0.75) | 4.3 A | Same (a2) | M123CXRH | N/A |
| M223 | M223CX | 2 (1.5) | 8.6 A | Same (a2) | M223CXR | M223CXRP |
| M223H | M223CXH | 2 (1.5) | 8.6 A | Same (a2) | M223CXRH | N/A |
| M323 | M323CX | 3 (2.2) | 10.0 A | Same (a2) | M323CXR | M323CXRP |
| M323H | M323CXH | 3 (2.2) | 10.0 A | Same (a2) | M323CXRH | N/A |
| M523 | M523CX | 5 (4) | 16.5 A | Same (a2d) | M523CXR | N/A |
| M523H | M523CXH | 5 (4) | 16.5 A | Same (a2d) | M523CXRH | N/A |
| M723 | M723CX | 7.5 (5.5) | 24 A | Same (b) | M723CXR | N/A |
| M723H | M723CXH | 7.5 (5.5) | 24 A | Same (b) | M723CXRH | N/A |
| M1023 | M1023CX | 10 (7.5) | 32 A | Same (b) | M1023CXR | N/A |
| M1023H | M1023CXH | 10 (7.5) | 32 A | Same (b) | M1023CXRH | N/A |
| M1523 | M1523CX | 15 (11) | 48 A | Yes (d to d2 to d3) | M1523CXR | N/A |
| M1523H | M1523CXH | 15 (11) | 48 A | Yes (d to d2 to d3) | M1523CXRH | N/A |
| M2023 | M2023CX | 20 (15) | 56 A | Yes (d to d2 to d3) | M2023CXR | N/A |
| M2023H | M2023CXH | 20 (15) | 56 A | Yes (d to d2 to d3) | M2023CXRH | N/A |
| M2523 | M2523CX | M2523CXR | 25 (18.5) | 68 A | Yes (e to e2) | MMX2523U | N/A |
| M2523H | M2523CXH | M2523CXRH | 25 (18.5) | 68 A | Yes (e to e2) | MMX2523UH | N/A |
| M3023 | M3023CX | M3023CXR | 30 (22) | 95 A | Yes (e to e2) | MMX3023U | N/A |
| M3023H | M3023CXH | M3023CXRH | 30 (22) | 95 A | Yes (e to e2) | MMX3023UH | N/A |
| M4023 |M4023CX | M4023CXR | 40 (30) | 119 A | Same (f2) | MMX4023U | N/A |
| M4023H |M4023CXH | M4023CXRH | 40 (30) | 119 A | Same (f2) | MMX4023UH | N/A |
** Refer to the “CX (R, RH, & RP)™ Frame Sizes” area below for downloadable dimensional drawings (for size comparison).
- Models 25 – 40HP are no longer available in the CX series. View the suggested MX-U™ replacement models shown in the table.
| Legacy Models* | kW | Max Amps (FLA) | Size Reduced?** | Replacement Models* (Click to view details) | Upgrade to this model if your previous model included a brake board (SSB1 or SSB2) |
|---|---|---|---|---|---|
| M138 | M138CX | 1.1 | 2.4 A | Same (a2) | M138CXR | M138CXRP |
| M138H | M138CXH | 1.1 | 2.4 A | Same (a2) | M138CXRH | N/A |
| M238 | M238CX | 1.5 | 4 A | Same (a2) | M238CXR | M238CXRP |
| M238H | M238CXH | 1.5 | 4 A | Same (a2) | M238CXRH | N/A |
| M338 | M338CX | 2.2 | 5.6 A | Same (a2) | M338CXR | M338CXRP |
| M338H | M338CXH | 2.2 | 5.6 A | Same (a2) | M338CXRH | N/A |
| M538 | M538CX | 4 | 9 A | Same (a2) | M538CXR | M538CXRP |
| M538H | M538CXH | 4 | 9 A | Same (a2) | M538CXRH | N/A |
| M738 | M738CX | 5.5 | 12.5 A | Same (b) | M738CXR | N/A |
| M738H | M738CXH | 5.5 | 12.5 A | Same (b) | M738CXRH | N/A |
| M1038 | M1038CX | 7.5 | 16.5 A | Same (b) | M1038CXR | N/A |
| M1038H | M1038CXH | 7.5 | 16.5 A | Same (b) | M1038CXRH | N/A |
| M1538 | M1538CX | 11 | 24 A | Yes (d to d3) | M1538CXR | N/A |
| M1538H | M1538CXH | 11 | 24 A | Yes (d to d3) | M1538CXRH | N/A |
| M2038 | M2038CX | 15 | 29 A | Yes (d to d3) | M2038CXR | N/A |
| M2038H | M2038CXH | 15 | 29 A | Yes (d to d3) | M2038CXRH | N/A |
| M2538 | M2538CX | M2538CXR | 18.5 | 35 A | Yes (d to d2) | MMX2538U | N/A |
| M2538H | M2538CXH | M2538CXRH | 18.5 | 35 A | Yes (d to d2) | MMX2538UH | N/A |
| M3038 | M3038CX | M3038CXR | 22 | 45 A | Yes (d to d2) | MMX3038U | N/A |
| M3038H | M3038CXH | M3038CXRH | 22 | 45 A | Yes (d to d2) | MMX3038UH | N/A |
| M4038 | M4038CX | M4038CXR | 30 | 56 A | Yes (e to e2) | MMX4038U | N/A |
| M4038H | M4038CXH | M4038CXRH | 30 | 56 A | Yes (e to e2) | MMX4038UH | N/A |
** Refer to the “CX (R, RH, & RP)™ Frame Sizes” area below for downloadable dimensional drawings (for size comparison).
- Models 25 – 40HP are no longer available in the CX series. View the suggested MX-U™ replacement models shown in the table.
| Legacy Models* | HP (kW) | Max Amps (FLA) | Size Reduced?** | Replacement Models* (Click to view details) | Upgrade to this model if your previous model included a brake board (SSB1 or SSB2) |
|---|---|---|---|---|---|
| M146 | M146CX | 1 (0.75) | 2.4 A | Same (a2) | M146CXR | M146CXRP |
| M146H | M146CXH | 1 (0.75) | 2.4 A | Same (a2) | M146CXRH | N/A |
| M246 | M246CX | 2 (1.5) | 4 A | Same (a2) | M246CXR | M246CXRP |
| M246H | M246CXH | 2 (1.5) | 4 A | Same (a2) | M246CXRH | N/A |
| M346 | M346CX | 3 (2.2) | 5.6 A | Same (a2) | M346CXR | M346CXRP |
| M346H | M346CXH | 3 (2.2) | 5.6 A | Same (a2) | M346CXRH | N/A |
| M546 | M546CX | 5 (4) | 9 A | Same (a2) | M546CXR | M546CXRP |
| M546H | M546CXH | 5 (4) | 9 A | Same (a2) | M546CXRH | N/A |
| M746 | M746CX | 7.5 (5.5) | 12.5 A | Same (b) | M746CXR | N/A |
| M746H | M746CXH | 7.5 (5.5) | 12.5 A | Same (b) | M746CXRH | N/A |
| M1046 | M1046CX | 10 (7.5) | 16.5 A | Same (b) | M1046CXR | N/A |
| M1046H | M1046CXH | 10 (7.5) | 16.5 A | Same (b) | M1046CXRH | N/A |
| M1546 | M1546CX | 15 (11) | 24 A | Yes (d to d3) | M1546CXR | N/A |
| M1546H | M1546CXH | 15 (11) | 24 A | Yes (d to d3) | M1546CXRH | N/A |
| M2046 | M2046CX | 20 (15) | 29 A | Yes (d to d3) | M2046CXR | N/A |
| M2046H | M2046CXH | 20 (15) | 29 A | Yes (d to d3) | M2046CXRH | N/A |
| M2546 | M2546CX | M2546CXR | 25 (18.5) | 35 A | Yes (d to d2) | MMX2546U | N/A |
| M2546H | M2546CXH | M2546CXRH | 25 (18.5) | 35 A | Yes (d to d2) | MMX2546UH | N/A |
| M3046 | M3046CX | M3046CXR | 30 (22) | 45 A | Yes (d to d2) | MMX3046U | N/A |
| M3046H | M3046CXH | M3046CXRH | 30 (22) | 45 A | Yes (d to d2) | MMX3046UH | N/A |
| M4046 | M4046CX | M4046CXR | 40 (30) | 56 A | Yes (e to e2) | MMX4046U | N/A |
| M4046H | M4046CXH | M4046CXRH | 40 (30) | 56 A | Yes (e to e2) | MMX4046UH | N/A |
** Refer to the “CX (R, RH, & RP)™ Frame Sizes” area below for downloadable dimensional drawings (for size comparison).
- Models 25 – 40HP are no longer available in the CX series. View the suggested MX-U™ replacement models shown in the table.
| Legacy Models* | HP (kW) | Max Amps (FLA) | Size Reduced?** | Replacement Models* (Click to view details) | Upgrade to this model if your previous model included a brake board (SSB1 or SSB2) |
|---|---|---|---|---|---|
| M157 | M157CX | 1 (0.75) | 1.8 A | Same (a2) | M157CXR | M157CXRP |
| M157H | M157CXH | 1 (0.75) | 1.8 A | Same (a2) | M157CXRH | N/A |
| M257 | M257CX | 2 (1.5) | 3.2 A | Same (a2) | M257CXR | M257CXRP |
| M257H | M257CXH | 2 (1.5) | 3.2 A | Same (a2) | M257CXRH | N/A |
| M357 | M357CX | 3 (2.2) | 4.7 A | Same (a2) | M357CXR | M357CXRP |
| M357H | M357CXH | 3 (2.2) | 4.7 A | Same (a2) | M357CXRH | N/A |
| M557 | M557CX | 5 (4) | 7.2 A | Same (a2) | M557CXR | M557CXRP |
| M557H | M557CXH | 5 (4) | 7.2 A | Same (a2) | M557CXRH | N/A |
| M757 | M757CX | 7.5 (5.5) | 9.7 A | Same (b) | M757CXR | N/A |
| M757H | M757CXH | 7.5 (5.5) | 9.7 A | Same (b) | M757CXRH | N/A |
| M1057 | M1057CX | 10 (7.5) | 13 A | Same (b) | M1057CXR | N/A |
| M1057H | M1057CXH | 10 (7.5) | 13 A | Same (b) | M1057CXRH | N/A |
| M1557 | M1557CX | 15 (11) | 19 A | Yes (d to d3) | M1557CXR | N/A |
| M1557H | M1557CXH | 15 (11) | 19 A | Yes (d to d3) | M1557CXRH | N/A |
| M2057 | M2057CX | 20 (15) | 23 A | Yes (d to d2) | M2057CXR | N/A |
| M2057H | M2057CXH | 20 (15) | 23 A | Yes (d to d2) | M2057CXRH | N/A |
| M2557 | M2557CX | M2557CXR | 25 (18.5) | 28 A | Yes (e to e2 to d2) | MMX2557U | N/A |
| M2557H | M2557CXH | M2557CXRH | 25 (18.5) | 28 A | Yes (e to e2 to d2) | MMX2557UH | N/A |
| M3057 | M3057CX | M3057CXR | 30 (22) | 36 A | Yes (e to e2 to d2) | MMX3057U | N/A |
| M3057H | M3057CXH | M3057CXRH | 30 (22) | 36 A | Yes (e to e2 to d2) | MMX3057UH | N/A |
| M4057 | M4057CX | M4057CXR | 40 (30) | 45 A | Yes (e to e2) | MMX4057U | N/A |
| M4057H | M4057CXH | M4057CXRH | 40 (30) | 45 A | Yes (e to e2) | MMX4057UH | N/A |
** Refer to the “CX (R, RH, & RP)™ Frame Sizes” area below for downloadable dimensional drawings (for size comparison).
- Models 25 – 40HP are no longer available in the CX series. View the suggested MX-U™ replacement models shown in the table.