High speed medium inertia AC servo motor EM3J-04
Output power
400 W
Rated speed
3000 rpm
Maximum speed
6000 rpm
Rated torque
1.27 Nm
Flange
60 mm
EM3J-04 is a high speed and medium inertia 400 W synchronous AC brushless servo motor. The motors can be equipped with 17-bit magnetic or 23-bit optical absolute encoder. Optional 24VDC brake is available.
Technical data
Rated torque
1.27 Nm
Maximum torque (EM3J-04ATA)
3.81 Nm
Maximum torque (EM3J-04ALA)
4.46 Nm
Rated current
2.8 A
Maximum current (EM3J-04ATA)
8.8 A
Maximum current (EM3J-04ALA)
11.2 A
Motor inertia (motor without brake)
0.64 kg∙cm²
Motor inertia (motor with brake)
0.68 kg∙cm²
Allowable radial shaft load
245 N
Allowable axial shaft load
74 N
Optional brake holding torque
≥1.5 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 (EM3J-04ATA)
3.81 Nm
Maximum torque (EM3J-04ALA)
4.46 Nm
Rated current
2.8 A
Maximum current (EM3J-04ATA)
8.8 A
Maximum current (EM3J-04ALA)
11.2 A
Motor inertia (motor without brake)
0.64 kg∙cm²
Motor inertia (motor with brake)
0.68 kg∙cm²
Allowable radial shaft load
245 N
Allowable axial shaft load
74 N
Optional brake holding torque
≥1.5 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 |
| Absolute optic encoder, resolution 23-bit (8 388 608 ppr) | - | - | ED3L-04AEA ED3L-04APA | Single phase AC 200V...240V | |
| EM3J-04ALA241 | ✓ | ||||
| EM3J-04ALA222 | - | ✓ | |||
| EM3J-04ALA242 | ✓ | ||||
| EM3J-04ATA221 | Absolute magnetic encoder, resolution 17-bit (131 072 ppr) | - | - | ||
| EM3J-04ATA241 | ✓ | ||||
| EM3J-04ATA222 | - | ✓ | |||
| EM3J-04ATA242 | ✓ |
Dimensions of AC servo motor EM3J-04
| Motor model | L, mm | LL, mm |
| EM3J-04ALA22x | 129 | 99 |
| EM3J-04ALA24x | 158 | 128 |
| EM3J-04ATA22x | 148 | 118 |
| EM3J-04ATA24x | 177 | 147 |
Speed-torque curves of AC servo motor EM3J-04
Description of AC servo motor EM3J-04
EM3J-04 is a high speed and medium inertia 400 W synchronous AC brushless servo motor. The motors can be equipped with 17-bit magnetic or 23-bit optical absolute encoder.
Independent electromagnetic design improve rotor rotation inertia. Inherit all the advantages of EM3A series, but with higher inertia. This high speed series offers a range of output power and different encoder types.
Optional 24 VDC brake is available.
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