High speed low inertia AC servo motor EM3A-04
Output power
400 W
Rated speed
3000 rpm
Maximum speed
6000 rpm
Rated torque
1.27 Nm
Flange
60 mm
EM3A-04 is a high speed and low inertia 400 W synchronous AC servo motor. High dynamics, high overload possibility and excellent accuracy make this model one of the most popular on the industrial market. Feedback system - 17-bit, 20-bit or 23-bit absolute or incremental, optical or magnetic encoder.
Technical data
Rated torque
1.27 Nm
Maximum torque (EM3A-04AFA and EM3A-04ATA)
3.81 Nm
Maximum torque (EM3A-04ALA)
4.46 Nm
Rated current
2.9 A
Maximum current (EM3A-04AFA and EM3A-04ATA)
9.2 A
Maximum current (EM3A-04ALA)
11.5 A
Motor inertia (motor without brake)
0.244 kg∙cm²
Motor inertia (motor with brake)
0.276 kg∙cm²
Allowable radial shaft load
245 N
Allowable axial shaft load
74 N
Optional brake holding torque
≥0.15 Nm
Optional brake voltage
24 VDC
Weight (motor without brake)
1.3 kg
Weight (motor with brake)
1.7 kg
Rated torque
1.27 Nm
Maximum torque (EM3A-04AFA and EM3A-04ATA)
3.81 Nm
Maximum torque (EM3A-04ALA)
4.46 Nm
Rated current
2.9 A
Maximum current (EM3A-04AFA and EM3A-04ATA)
9.2 A
Maximum current (EM3A-04ALA)
11.5 A
Motor inertia (motor without brake)
0.244 kg∙cm²
Motor inertia (motor with brake)
0.276 kg∙cm²
Allowable radial shaft load
245 N
Allowable axial shaft load
74 N
Optional brake holding torque
≥0.15 Nm
Optional brake voltage
24 VDC
Weight (motor without brake)
1.3 kg
Weight (motor with brake)
1.7 kg
Available motor models
| Motor model | Encoder | Brake | Waterproof connector | Servo driver | Input drive supply voltage | Note |
| Absolute optic encoder, resolution 23-bit (8 388 608 ppr) | - | - | ED3L-04AEA ED3L-04APA | Single phase AC 200V...240V | - | |
| EM3A-04ALA241 | ✓ | |||||
| EM3A-04ALA222 | - | ✓ | ||||
| EM3A-04ALA242 | ✓ | |||||
| EM3A-04ALA223 | - | |||||
| EM3A-04ALA243 | ✓ | |||||
| EM3A-04ATA221 | Absolute magnetic encoder, resolution 17-bit (131 072 ppr) | - | - | |||
| EM3A-04ATA241 | ✓ | |||||
| EM3A-04ATA222 | - | ✓ | ||||
| EM3A-04ATA242 | ✓ | |||||
| EM3A-04ATA223 | - | |||||
| EM3A-04ATA243 | ✓ | |||||
| EM3A-04AFA221 | Incremental optic encoder, resolution 20-bit (1 048 576 ppr) | - | - | Not recommended for new projects | ||
| EM3A-04AFA241 | ✓ | |||||
| EM3A-04AFA222 | - | ✓ | ||||
| EM3A-04AFA242 | ✓ |
Dimensions of AC servo motor EM3A-04
| Motor model | L, mm | LL, mm |
| EM3A-04ALA22x | 129 | 99 |
| EM3A-04ALA24x | 158 | 128 |
| EM3A-04ATA22x | 148 | 118 |
| EM3A-04AFA22x | ||
| EM3A-04ATA24x | 177 | 147 |
| EM3A-04AFA24x |
Speed-torque curves of AC servo motor EM3A-04
Description of AC servo motor EM3A-04
EM3A-04 is a high speed and low inertia 400 W synchronous AC servo motor. High dynamics, high overload possibility and excellent accuracy make this model one of the most popular on the industrial market. The motors are suitable for high speed applications with a maximum speed of 6000 rpm. Feedback system - 17-bit, 20-bit or 23-bit absolute or incremental, optical or magnetic encoder. Products can be provided with a 24 VDC holding brake option.
The EM3A series boasts a low inertia design for extremely-fast response times. These motors are highlighted with the perfect combination of compact size and high torque performance, ensuring unparalleled dynamic response and precision positioning when used together with servo drivers ED3L series. Versatile and powerful, the these servo drive systems has a wide range of applications, thanks to its top-tier performance, varied power range, and compact form factor. Elevate your technical operations with the EM3A series servo motors and ED3L servo drive system.
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