Basic Information

Manufacturer: NIDEC (formerly Control Techniques under Emerson)

Origin: UK

Frame Specification: 142mm (square flange)

Protection Level: IP65 (dustproof and splashproof waterproof)

Cooling Method: Natural Cooling (without fan)

Encoder: 4096ppr Incremental (standard)

Weight: Approximately 14.5kg (31.9LB)

Status: Mainstream high-performance servo, main model for industrial automation

Model Interpretation (Segmented Explanation)

142: Frame size 142mm

U3: Unimotor FM series, 3000rpm speed grade

C: Winding specification (460VAC, high torque)

300: Rated speed 3000rpm

VAC: Voltage level 460VAC (compatible with 400V/460V industrial power grid)

AA: No brake, standard inertia, 90° connector

165240: Flange BCD 165mm, shaft diameter 24mm, standard keyway

Core Parameters

Rated Voltage: 460VAC (compatible with 380–480VAC)

Rated Torque: 12.8Nm (113.3lb-in)

Rated Current: 9.8A (single phase)

Rated Speed: 3000rpm

Rated Power: 4.0kW (5.39HP)

Peak Torque: 38.4Nm (3 times rated)

Peak Current: 29.4A

Rotor Inertia: 37.44kg・cm² (standard inertia)

Insulation Class: F grade (155℃)

Operating Temperature: 0°C ~ +40°C (natural cooling)

Shaft Diameter: 24mm (with standard keyway)

Flange: 165mm BCD, IEC standard Function positioning

High-performance brushless servo, continuous rated torque 12.8Nm, 3000rpm, suitable for medium and large power automation equipment

Natural cooling design, compact structure, IP65 protection, suitable for harsh industrial environments

Standard 4096ppr incremental encoder, high positioning accuracy, fast dynamic response

No-brake version, suitable for horizontal axis, continuous operation, high-frequency start-stop scenarios

Standard inertia rotor, balancing response speed and load adaptability

Compatible with drivers

Equipped with NIDEC/Control Techniques Unidrive M700/M701/M702 servo drives

Compatible with Emerson CT older Unidrive SP series (requires parameter adaptation)

Control modes: position/velocity/torque closed-loop, supports EtherCAT, PROFIBUS, Modbus RTU

Typical applications

Machine tool processing: CNC milling machines, lathes, machining centers spindle and feed axis

Industrial robots: six-axis joint robots, SCARA robots drive

Packaging equipment: high-speed labeling machines, filling machines, pillow packaging machines

Textile machinery: high-speed looms, knitting machines, printing machines

Logistics equipment: high-speed sorting machines, AGV carts, lifting platforms

Key differences (compared with 142U3C305VACAA165240)

142U3C300VACAA165240: 3000rpm, 12.8Nm, 4.0kW, no brake

142U3C305VACAA165240: 3000rpm, 18.2Nm, 5.7kW, with brake