Micro-Speed® MX™ Legacy Models

Motor Control Solutions for Industrial and Material Handling Equipment

Pictured is a legacy (non-current) MX™ model. Use the tables on this page to find replacement information.

Why did the model numbers change?

Do you have an older Micro-Speed® MX™ model that you are replacing/upgrading? Since the introduction of our NEW MX-Ultra™ series, the sizes of several of the MX™ models have been reduced, and the model numbers have changed slightly (the letter “U” for Ultra™ is added to the model number).

The MX-Ultra™ models inherit all of the same essential specifications (HP, Amperage, temp ratings, etc.) and advanced features of the previous Micro-Speed^® MX™ models, but now include Amazing NEW Ultra™ features including the following:

PE^® S.A.M.™ Anti-Sway Control (built-in/unlockable option)
EASY PLC Communication via optically isolated Ethernet port. Ethernet/IP™, Modbus TCP/IP, and other protocols available.
PE^® Smart-Set. Upload/download settings in a snap using only a flash drive – no PC needed!
Plus many more!

Use the charts below to find the direct replacement for your model, then click on the current product link for more details.

Previously-available MX™ models and suggested replacements (listed by Line Voltage)

Legacy Models*	HP (kW)	Max Amps (FLA)	Size Reduced?**	Replacement Models* (Click to view details)
MMX123 \| MMX123H	1 (0.75)	4.3 A	Yes (d4 to a2-Ultra)	MMX123U \| MMX123UH
MMX223 \| MMX223H	2 (1.5)	8.6 A	Yes (d4 to a2-Ultra)	MMX223U \| MMX223UH
MMX323 \| MMX323H	3 (2.2)	10.0 A	Yes (d4 to a2-Ultra)	MMX323U \| MMX323UH
MMX523 \| MMX523H	5 (4)	16.5 A	Yes (d4 to a2d-Ultra)	MMX523U \| MMX523UH
MMX723 \| MMX723H	7.5 (5.5)	24 A	Yes (d4 to b-Ultra)	MMX723U \| MMX723UH
MMX1023 \| MMX1023H	10 (7.5)	32 A	Yes (d4 to b-Ultra)	MMX1023U \| MMX1023UH
MMX1523 \| MMX1523H	15 (11)	48 A	Yes (d2 to d3-Ultra)	MMX1523U \| MMX1523UH
MMX2023 \| MMX2023H	20 (15)	56 A	Yes (d2 to d3-Ultra)	MMX2023U \| MMX2023UH
MMX2523 \| MMX2523H	25 (18.5)	68 A	Same (e2)	MMX2523U \| MMX2523UH
MMX3023 \| MMX3023H	30 (22)	95 A	Same (e2)	MMX3023U \| MMX3023UH
MMX4023 \| MMX4023H	40 (30)	119 A	Same (f2)	MMX4023U \| MMX4023UH
MMX5023 \| MMX5023H	50 (37)	141 A	Same (f2)	MMX5023U \| MMX5023UH
MMX6023 \| MMX6023H	60 (45)	166 A	Same (g)	MMX6023U \| MMX6023UH
MMX7523 \| MMX7523H	75 (55)	215 A	Same (g)	MMX7523U \| MMX7523UH
MMX10023 \| MMX10023H	100 (75)	255 A	Same (h)	MMX10023U \| MMX10023UH
MMX12523 \| MMX12523H	125 (90)	320 A	Same (h)	MMX12523U \| MMX12523UH
MMX15023 \| MMX15023H	150 (110)	375 A	Same (h)	MMX15023U \| MMX15023UH

*Or these same models with a “-XX” suffix. Models ending with “H” are preset for hoisting/lifting applications.

** Refer to the “MX™ and MX-Ultra™ Frame Sizes” area below for downloadable dimensional drawings (for size comparison).

Legacy Models*	HP (kW)	Max Amps (FLA)	Size Reduced?**	Replacement Models* (Click to view details)
MMX138 \| MMX138H	1 (0.75)	2.4 A	Yes (d4 to a2-Ultra)	MMX138U \| MMX138UH
MMX238 \| MMX238H	2 (1.5)	4 A	Yes (d4 to a2-Ultra)	MMX238U \| MMX238UH
MMX338 \| MMX338H	3 (2.2)	5.6 A	Yes (d4 to a2-Ultra)	MMX338U \| MMX338UH
MMX538 \| MMX538H	5 (4)	9 A	Yes (d4 to a2-Ultra)	MMX538U \| MMX538UH
MMX738 \| MMX738H	7.5 (5.5)	12.5 A	Yes (d4 to b-Ultra)	MMX738U \| MMX738UH
MMX1038 \| MMX1038H	10 (7.5)	16.5 A	Yes (d4 to b-Ultra)	MMX1038U \| MMX1038UH
MMX1538 \| MMX1538H	15 (11)	24 A	Yes (d2 to d3-Ultra)	MMX1538U \| MMX1538UH
MMX2038 \| MMX2038H	20 (15)	29 A	Yes (d2 to d3-Ultra)	MMX2038U \| MMX2038UH
MMX2538 \| MMX2538H	25 (18.5)	35 A	Same (d2-Ultra)	MMX2538U \| MMX2538UH
MMX3038 \| MMX3038H	30 (22)	45 A	Same (d2-Ultra)	MMX3038U \| MMX3038UH
MMX4038 \| MMX4038H	40 (30)	56 A	Same (e2)	MMX4038U \| MMX4038UH
MMX5038 \| MMX5038H	50 (37)	68 A	Same (e2)	MMX5038U \| MMX5038UH
MMX6038 \| MMX6038H	60 (45)	82 A	Same (e2)	MMX6038U \| MMX6038UH
MMX7538 \| MMX7538H	75 (55)	100 A	Same (f2)	MMX7538U \| MMX7538UH
MMX10038 \| MMX10038H	100 (75)	call PE	Yes (g to f2)	MMX10038U \| MMX10038UH
MMX12538 \| MMX12538H	125 (90)	call PE	Same (g)	MMX12538U \| MMX12538UH
MMX15038 \| MMX15038H	150 (110)	call PE	Same (g)	MMX15038U \| MMX15038UH
MMX20038 \| MMX20038H	200 (150)	call PE	Same (h)	MMX20038U \| MMX20038UH
MMX25038 \| MMX25038H	250 (185)	call PE	Same (h)	MMX25038U \| MMX25038UH
MMX30038 \| MMX30038H	300 (225)	call PE	Same (h)	MMX30038U \| MMX30038UH

*Or these same models with a “-XX” suffix. Models ending with “H” are preset for hoisting/lifting applications.

** Refer to the “MX™ and MX-Ultra™ Frame Sizes” area below for downloadable dimensional drawings (for size comparison).

Legacy Models*	HP (kW)	Max Amps (FLA)	Size Reduced?**	Replacement Models* (Click to view details)
MMX146 \| MMX146H	1 (0.75)	2.4 A	Yes (d4 to a2-Ultra)	MMX146U \| MMX146UH
MMX246 \| MMX246H	2 (1.5)	4 A	Yes (d4 to a2-Ultra)	MMX246U \| MMX246UH
MMX346 \| MMX346H	3 (2.2)	5.6 A	Yes (d4 to a2-Ultra)	MMX346U \| MMX346UH
MMX546 \| MMX546H	5 (4)	9 A	Yes (d4 to a2-Ultra)	MMX546U \| MMX546UH
MMX746 \| MMX746H	7.5 (5.5)	12.5 A	Yes (d4 to b-Ultra)	MMX746U \| MMX746UH
MMX1046 \| MMX1046H	10 (7.5)	16.5 A	Yes (d4 to b-Ultra)	MMX1046U \| MMX1046UH
MMX1546 \| MMX1546H	15 (11)	24 A	Yes (d2 to d3-Ultra)	MMX1546U \| MMX1546UH
MMX2046 \| MMX2046H	20 (15)	29 A	Yes (d2 to d3-Ultra)	MMX2046U \| MMX2046UH
MMX2546 \| MMX2546H	25 (18.5)	35 A	Same (d2-Ultra)	MMX2546U \| MMX2546UH
MMX3046 \| MMX3046H	30 (22)	45 A	Same (d2-Ultra)	MMX3046U \| MMX3046UH
MMX4046 \| MMX4046H	40 (30)	56 A	Same (e2)	MMX4046U \| MMX4046UH
MMX5046 \| MMX5046H	50 (37)	68 A	Same (e2)	MMX5046U \| MMX5046UH
MMX6046 \| MMX6046H	60 (45)	82 A	Same (e2)	MMX6046U \| MMX6046UH
MMX7546 \| MMX7546H	75 (55)	100 A	Same (f2)	MMX7546U \| MMX7546UH
MMX10046 \| MMX10046H	100 (75)	131 A	Yes (g to f2)	MMX10046U \| MMX10046UH
MMX12546 \| MMX12546H	125 (90)	166 A	Same (g)	MMX12546U \| MMX12546UH
MMX15046 \| MMX15046H	150 (110)	196 A	Same (g)	MMX15046U \| MMX15046UH
MMX20046 \| MMX20046H	200 (150)	250 A	Same (h)	MMX20046U \| MMX20046UH
MMX25046 \| MMX25046H	250 (185)	315 A	Same (h)	MMX25046U \| MMX25046UH
MMX30046 \| MMX30046H	300 (220)	355 A	Same (h)	MMX30046U \| MMX30046UH
MMX35046 \| MMX35046H	350 (260)	450 A	Same (h)	MMX35046U \| MMX35046UH
MMX40046 \| MMX40046H	400 (300)	495 A	Same (h)	MMX40046U \| MMX40046UH
MMX50046 \| MMX50046H	500 (375)	620 A	Same (j)	MMX50046U \| MMX50046UH
MMX60046 \| MMX60046H	600 (450)	720 A	Same (j)	MMX60046U \| MMX60046UH

*Or these same models with a “-XX” suffix. Models ending with “H” are preset for hoisting/lifting applications.

** Refer to the “MX™ and MX-Ultra™ Frame Sizes” area below for downloadable dimensional drawings (for size comparison).

Legacy Models*	HP (kW)	Max Amps (FLA)	Size Reduced?**	Replacement Models* (Click to view details)
MMX157 \| MMX157H	1 (0.75)	1.8 A	Yes (d4 to a2-Ultra)	MMX157U \| MMX157UH
MMX257 \| MMX257H	2 (1.5)	3.2 A	Yes (d4 to a2-Ultra)	MMX257U \| MMX257UH
MMX357 \| MMX357H	3 (2.2)	4.7 A	Yes (d4 to a2-Ultra)	MMX357U \| MMX357UH
MMX557 \| MMX557H	5 (4)	7.2 A	Yes (d4 to a2-Ultra)	MMX557U \| MMX557UH
MMX757 \| MMX757H	7.5 (5.5)	9.7 A	Yes (d4 to b-Ultra)	MMX757U \| MMX757UH
MMX1057 \| MMX1057H	10 (7.5)	13 A	Yes (d4 to b-Ultra)	MMX1057U \| MMX1057UH
MMX1557 \| MMX1557H	15 (11)	19 A	Yes (d2 to d3-Ultra)	MMX1557U \| MMX1557UH
MMX2057 \| MMX2057H	20 (15)	23 A	Same (d2-Ultra)	MMX2057U \| MMX2057UH
MMX2557 \| MMX2557H	25 (18.5)	28 A	Same (d2-Ultra)	MMX2557U \| MMX2557UH
MMX3057 \| MMX3057H	30 (22)	36 A	Same (d2-Ultra)	MMX3057U \| MMX3057UH
MMX4057 \| MMX4057H	40 (30)	45 A	Same (e2)	MMX4057U \| MMX4057UH
MMX5057 \| MMX5057H	50 (37)	55 A	Same (e2)	MMX5057U \| MMX5057UH
MMX6057 \| MMX6057H	60 (45)	64 A	Same (e2)	MMX6057U \| MMX6057UH
MMX7557 \| MMX7557H	75 (55)	78 A	Same (f2)	MMX7557U \| MMX7557UH
MMX10057 \| MMX10057H	100 (75)	102 A	Same (f2)	MMX10057U \| MMX10057UH
MMX12557 \| MMX12557H	125 (90)	133 A	Same (g)	MMX12557U \| MMX12557UH
MMX15057 \| MMX15057H	150 (110)	157 A	Same (g)	MMX15057U \| MMX15057UH
MMX20057 \| MMX20057H	200 (150)	200 A	Same (h)	MMX20057U \| MMX20057UH
MMX25057 \| MMX25057H	250 (185)	248 A	Same (h)	MMX25057U \| MMX25057UH
MMX30057 \| MMX30057H	300 (220)	285 A	Same (h)	MMX30057U \| MMX30057UH

*Or these same models with a “-XX” suffix. Models ending with “H” are preset for hoisting/lifting applications.

** Refer to the “MX™ and MX-Ultra™ Frame Sizes” area below for downloadable dimensional drawings (for size comparison).