MDD025A-N-100-N2G-040GF0

MDD Synchronous Motors

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The Bosch Rexroth Indramat MDD025A-N-100-N2G-040GF0 servo motor from the MDD Synchronous Motors series is a high-precision motor for digital drive controllers featuring a motor length code of A and a centering diameter of 40 mm. This permanent-magnet digital AC unit delivers a continuous torque at standstill of 0.33 Nm and operates at a nominal speed of 10000 min⁻¹. It employs a Resolver feedback system for accurate rotor position and speed control and is driven by a Plain shaft with shaft seal. Connections are made via a Connecting cable with coupling unit in a right orientation, and it is supplied Without blocking brake, offering flexibility in fail-safe configurations.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

Centering Diameter
40 mm

Housing
Standard

Motor Feedback
Resolver feedback

Continuous Torque at Standstill
0.33 Nm

Motor Length Code
A

Motor Size
025

Nominal Speed
10000 min⁻¹

Shaft Seal
With shaft seal

Shaft Type
Plain shaft

Connection Direction
Right

Connection Type
Connecting cable with coupling unit

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What does the motor length code “A” indicate in terms of power density and mounting envelope for MDD025A series?

Length code “A” is the shortest standard frame length for size 025, meaning lower rotor inertia and more compact envelope, but less peak (overload) capability than longer (B, C) versions. It suits applications where space is constrained and torque demands are moderate.

How critical is the cable connection type (“connecting cable with coupling unit”) to the motor’s electrical performance and installation?

This type ensures consistent shielding, connector reliability, and simplified installation; mismatched or long cables degrade signal fidelity in resolver feedback or increase power losses. Using proper coupling and keeping cable runs within spec helps avoid voltage drop or control instability.

In what way does choosing this motor affect thermal management in high-duty cycles?

The continuous torque at standstill specification assumes certain cooling conditions; since it lacks an integral brake or fan, heat dissipation depends on ambient temperature, enclosure design, and duty cycle. Excessive continuous loading without adequate cooling can lead to winding overheating or reduced motor life.

How does the model code “MDD025A-N-100-N2G-040GF0” inform a system integrator about compatibility with digital drive systems?

The code signifies: size 025, length “A”, “N-100” nominal speed 10000 min⁻¹, feedback “G” (resolver), centering diameter 040 mm, plain shaft with shaft seal (“G” in “GF0”), no blocking brake (“0” in last position). It lets you ensure the motor matches drive control firmware, mounting dimensions, and mechanical interfaces.

What trade-offs are present when using a motor without side B shaft-end or additional shaft output?

Without a side B shaft-end, options like dual shafted load attachments or accessories (e.g. encoders, gearboxes) are limited to one side, which may constrain layout flexibility. But it reduces complexity, sealing challenges, and cost in compact single-output designs.

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Internal Product Review

The MDD025A-N-100-N2G-040GF0 motor from Bosch Rexroth delivers 0.33 Nm continuous torque at standstill and operates at 10000 min⁻¹. It features resolver feedback, a plain shaft with shaft seal, and a standard housing design. This motor suits applications in semiconductor equipment, compact robotics, and medical automation systems.