B&R 8LSA45.EA030D100-3 | 3000 RPM Servo Motor | Motion Control Replacement

Description

B&R 8LSA45.EA030D100-3 Synchronous Servo Motor

Key Technical Specifications

The public documentation is not completely consistent. One detailed configuration record specifies IP65, 230 V, 1.31 Nm and a 20-bit single-turn EnDat encoder, while other records for the exact part number list IP64 and a 21 A / 12.5 Nm stall-torque description. These values should not be mixed into one assumed datasheet; the motor nameplate and original B&R configuration data should take precedence.

Product Introduction

The B&R 8LSA45.EA030D100-3 is a compact synchronous servo motor from the B&R 8LS family, intended for machine-axis motion where controlled speed, position and torque are required. The published configuration identifies a 3000 rpm motor with 0.4 kW rated output, 1.31 Nm rated torque, self-cooling, single-turn inductive EnDat feedback and no holding brake.

This motor belongs in a complete B&R motion-control chain rather than being evaluated as an isolated motor. The servo drive, feedback interface, motor cable, mechanical load and controller configuration all affect whether a replacement will commission correctly. The angled connector and compact flange arrangement are useful in machine installations where cable routing and available mounting space are constrained.

8LSA45.EA030D100-3

Application Scenarios & Field Pitfalls — The Engineer’s Perspective

Engineering Pain Point

The main replacement risk is matching the motor by physical appearance or the first five characters of the part number instead of matching the complete electrical and feedback configuration. B&R 8LS motors with the same 45 mm family designation can have different speed, feedback, voltage, brake, shaft and torque configurations. The EA030D100-3 suffix therefore matters. Do not substitute another 8LSA45 motor simply because its flange and connector appear identical.

Typical Applications

• Packaging and indexing machinery requiring controlled rotary positioning.
• Pick-and-place and material-handling axes.
• Machine tools and automated production equipment.
• Existing B&R ACOPOS-based motion systems requiring an exact motor replacement.

The 8LSA45.EA030D100-3 is documented specifically as a B&R 8LS synchronous servo motor and appears in B&R Automation product catalogs and industrial automation component records.

Technical Pitfalls to Avoid

1. Do not confuse rated torque with stall torque.
   Published sources for this exact part use 1.31 Nm as rated torque, while other records quote 12.5 Nm as stall torque. Those values describe different operating conditions and should not be substituted for one another.
2. Verify the encoder before commissioning.
   The detailed configuration identifies an inductive single-turn EnDat encoder. The drive must support the corresponding feedback technology and configuration.
3. Do not assume IP64 or IP65 from a reseller listing.
   Both ratings appear in public records for the exact model. For an installation exposed to washdown, coolant or directed water, use the rating on the actual motor documentation or nameplate.
4. Check the absence of a holding brake.
   This model is documented without a holding brake. If the vertical axis depends on a motor brake for load retention, this motor configuration cannot simply be treated as a brake-equipped equivalent.
5. Check the mechanical shaft configuration.
   Detailed records identify a keyed shaft, while some less-specific listings describe the shaft as smooth. Confirm the actual shaft before ordering because coupling and gearbox interfaces are mechanical compatibility items, not software parameters.
6. Do not use the motor’s current figure as a drive-sizing value without clarification.
   The 21 A figure appears in secondary descriptions, but it is not enough by itself to determine the required ACOPOS drive. Drive selection should be based on the complete B&R motor data and the machine’s duty cycle.

Related Products

• B&R 8LSA45.EA030D100-0 — Same basic 8LSA45 / 3000 rpm family designation, but an earlier configuration record; its published data differs from the -3 revision and should not be treated as automatically interchangeable.
• B&R 8LSA45.EA030D000-0 — Related 45 mm 8LS configuration with a different shaft configuration and encoder-related code; replacement compatibility requires verification.
• B&R 8LSA45.EA045D000-0 — Related 8LSA45 motor configured for 4500 rpm rather than the 3000 rpm designation of the subject motor.
• B&R 8LSA44.EA030D100-3 — Similar 8LS family configuration with a different frame designation; dimensional and torque compatibility must be checked before substitution.
• B&R 8LSA46.EA030D300-3 — Related 8LS synchronous motor family member with different pole/torque/brake configuration; not a direct substitute by model-family name alone.
• B&R 8LSA57.EA030D700-3 — Larger 8LS motor configuration with substantially different mechanical and torque characteristics.
• B&R 8LSA35.EB030D000-3 — Smaller 8LS family motor with different frame and torque characteristics; useful only as a family comparison, not an automatic replacement.

Procurement and Replacement Note

For a maintenance replacement, specify the complete 8LSA45. designation, not simply “B&R 8LSA45.” Confirm the motor nameplate, encoder type, shaft style, brake status, connector arrangement, rated data and protection rating before installation.

The public records contain genuine configuration discrepancies for this exact part number, particularly concerning IP rating, shaft description, voltage/current terminology and torque terminology. That is a reason to verify the physical nameplate and the machine’s original B&R project data rather than selecting a replacement from a visually similar 8LS motor.

For an existing machine, also record the associated B&R servo drive model, motor cable, encoder cable, axis parameters and controller/drive firmware before removing the original motor. This information is often more important to a successful restart than the motor’s mechanical fit alone.