B&R 8LSAA4.D9045S300-3 400VAC 4500RPM 2.8Nm Servo Motor with Brake Keyed Shaft

The B&R 8LSAA4.D9045S300-3 is a compact 400 VAC synchronous servo motor designed for machine axes that need multi-turn position feedback, a keyed shaft connection, and secure load holding after power removal.

This motor operates at 4500 rpm nominal speed and provides 2.800 Nm nominal torque. Its 14 mm keyed shaft is suitable for pulleys, couplings, timing-belt drives, and compact gearbox inputs where positive torque transfer is required.

The integrated 3.20 Nm holding brake is intended to retain a stationary axis during a controlled stop or power-off condition. This makes the model suitable for compact vertical mechanisms, indexed rotary modules, servo feeders, and transfer equipment where shaft movement must be controlled.

The EQI 1131 FS EnDat 2.2 multi-turn encoder provides absolute position feedback over multiple motor revolutions. When replacing an installed motor, the encoder type, brake option, shaft key, flange size, and centering diameter should match the original unit.

Key Features

400 VAC synchronous servo motor

4500 rpm nominal speed

2.800 Nm nominal torque

3.200 Nm stall torque

3.20 Nm holding brake

EnDat 2.2 multi-turn encoder

Keyed 14 mm shaft

70 mm square flange

60 mm centering diameter

Single-cable hybrid connection

Self-cooled motor construction

Typical Applications

Packaging machinery

Servo-driven feeders

Indexing mechanisms

Labeling equipment

Compact vertical axes

Assembly machinery

Printing and converting systems

Industrial servo motor replacement projects

Installation Notes

Confirm the original motor model, encoder type, brake requirement, shaft key dimensions, flange size, and centering diameter before replacement.

The holding brake is designed to hold a stationary axis. It should not be used as the primary method for repeated dynamic stopping.

Use a compatible B&R servo drive and matching hybrid motor cable. Verify the encoder configuration and brake wiring before commissioning.

FAQ

Q

Does 8LSAA4.D9045S300-3 include a holding brake

A

Yes it includes a 3.20 Nm holding brake

Q

What feedback device does this motor use

A

It uses an EQI 1131 FS EnDat 2.2 multi-turn encoder

Q

Is the shaft smooth or keyed

A

It has a keyed 14 mm shaft

Q

What is the nominal torque

A

The nominal torque is 2.800 Nm

Q

What is the nominal speed

A

The nominal speed is 4500 rpm