MDD025A-N-100-N2G-040GA1

MDD Synchronous Motors

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The MDD025A-N-100-N2G-040GA1 belongs to the MDD Synchronous Motors series from Bosch Rexroth Indramat. It is a compact AC servomotor designed for use with digital drive controllers, where it converts commanded current into precise rotary motion for positioning or speed-regulated axes in automated equipment.

At standstill the motor sustains 0.33 Nm of continuous torque, allowing it to hold modest loads without overheating during static phases of a duty cycle. Its rated speed of 10000 min⁻¹ supports high-throughput stations that need rapid acceleration and short cycle times. A centering diameter of 40 mm defines the locating fit between the motor flange and the machine frame, keeping radial runout within tolerance. Position and commutation data are supplied through a resolver feedback device, which is resistant to electrical noise and temperature changes. Power and feedback lines are terminated on a single Connector, simplifying replacements and reducing wiring errors.

During power-off conditions a blocking brake generates 1.0 Nm of holding torque so vertical or suspended loads remain stationary. All electrical terminations face Side A, a fixed orientation that aids cabinet layout and maintenance access. The mechanical envelope corresponds to motor size 025 with length code A, giving a short stack that fits tight spaces while limiting inertia. Rotor balancing is classified as Standard, which meets general-purpose vibration limits without requiring special couplings. Additional features, such as a plain shaft with a shaft seal and a standard housing, protect internal components from oil splash and fine dust common in automated assembly cells.

Technical Specifications

Balancing
Standard

Blocking Brake
With 1.0 Nm Blocking Brake

Centering Diameter
40 mm

Connection Direction
Side A

Connection Type
Connector

Continuous Torque at Standstill
0.33 Nm

Holding Brake
With blocking brake

Holding Brake Torque
1.0 Nm

Housing
Standard

Motor Feedback
Resolver feedback

Motor For Digital Drive Controllers
MDD

Motor Length Code
A

Motor Size
025

Nominal Speed
10000 min⁻¹

Output Shaft
Plain Shaft

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Shaft Seal
With shaft seal

Shaft Type
Plain shaft

Frequently Asked Questions

How does the 1.0 Nm holding (blocking) brake influence system safety and startup behavior?

The brake allows the motor shaft to be locked when power is off, preventing load sag or drift, which is critical for safety in vertical or heavy-load assemblies. However, the drive/brake actuation coordination must ensure torque from brake release is achieved before motion commands to avoid jerks or misalignment.

What are the trade-offs of having “standard balancing” in this motor?

Standard balancing reduces vibration at moderate speeds but may leave minor unbalance effects at very high RPMs or in ultra-precision applications. Higher classes of balancing are often required for long shafts or critical spindle applications to avoid resonances.

How is the “side A connector” / “connection direction” relevant in system integration?

The connector location and direction affect how cabling is routed, how nearby components interfere, and how flexing or bending loads occur on the cable. For space- constrained assemblies, ensuring the side A connector does not collide or impose tight bend radii helps in reliability and serviceability.

How does the product code “MDD025A-N-100-N2G-040GA1” by Bosch Rexroth encode motor features I need to know?

The code includes motor size (“025”), nominal speed (“100”), feedback type (“N2G”), centering diameter (“040”), motor length code (“A”), and design variants (“GA1”); knowing this helps to match exact motor footprint, feedback, and performance. Mis-matching any part of the code may lead to incompatibilities (mounting, connectors, feedback, torque curves).

In what B2B/build-automation or semiconductor equipment contexts is this motor particularly well suited?

It fits well where compact, high-speed motion with holding ability is needed—e.g. wafer handling, precision pick-and-place, rotary indexing tables. Its resolver feedback and blocking brake add reliability and safety in continuous-running or power-down scenarios, reducing drift and maintenance downtime.

Common Misspellings

Internal Product Review

The MDD025A-N-100-N2G-040GA1 motor from Bosch Rexroth features a nominal speed of 10,000 min⁻¹ and continuous torque of 0.33 Nm. It includes resolver feedback, a plain shaft, and a 1.0 Nm holding brake with shaft seal, making it suitable for precise positioning. This motor is ideal for use in semiconductor equipment, CNC automation, and packaging machines.