8MSA5L.E3-B5 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8MSA5L.E3-B5 is a synchronous motor from the 8MS Three Phase Synchronous Motors series and offers a rated power of 3.46 kW with a nominal speed of 3000 rpm. The motor features a self-cooling system, multi-turn EnDat inductive encoder with a frequency limit of at least 6 kHz, and produces a peak torque of 40.5 Nm. It has keyed shaft end, rotor inertia of 7.3 kgcm², and a stator inductance of 14.6 mH.
Internal Product Review
The 8MSA5L.E3-B5 is a B & R Automation three-phase synchronous motor with self-cooling and a keyed shaft. Rated output of 3.46 kW at 3000 rpm gives this motor a strong operating profile for dynamic servo applications. EnDat inductive multi-turn feedback supports dependable positioning performance, making the unit a very capable choice for precision motion systems.
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Product Description:
B&R Automation manufactures the 8MS Three Phase Synchronous Motors series for precision drive systems in factory machinery. The 8MSA5L.E3-B5 belongs to that series and is a three-phase synchronous motor intended to deliver repeatable position and speed control to gantries, packaging axes, and similar motion tasks. As an electromechanical actuator, it converts drive current from a servo inverter into controlled rotary motion while maintaining tight velocity regulation, and its self-contained housing simplifies installation inside distributed machine modules and reduces cabinet wiring requirements.
The motor’s continuous operating point is a rated output of 3.46 kW at 3000 rpm. At this speed, it can supply 40.5 Nm of peak torque for short overloads. A torque constant of 1.56 Nm/A relates inverter current directly to shaft torque. The windings show 1.55 Ω resistance and 14.6 mH inductance, which influence copper loss and current rise time. Because the unit is self-cooling, no external fan is required. Power and feedback connectors are positioned on the B side of the housing. Its size 5, length L geometry provides high rated torque, and the keyed shaft end mates with standard transmission components.
Dynamic response is set by a maximum rotational acceleration of 55479 rad/s², supported by a rotor inertia of 7.3 kgcm². The inductive EnDat multi-turn encoder supplies position data with a base resolution of 32 lines, tracks up to 4096 revolutions, and maintains ±400 arc-seconds precision while operating at frequencies of 6 kHz or higher at -3 dB. A voltage constant of 94 V/1000 rpm helps the drive predict back EMF. Because no holding brake is installed, external locking hardware must hold the axis during power loss. No oil seal is fitted, so the shaft zone needs separate splash protection. The keyed shaft and high acceleration support rapid index moves in packaging machines.
