MS2M03-B0FNN-KMDH0
MS2M Ultra Compact Motors
The MS2M03-B0FNN-KMDH0 is a synchronous servo motor from Bosch Rexroth Indramat that belongs to the MS2M Ultra Compact Motors series and falls under the Ultra Compact Motor product group. It occupies frame size 3 with frame length B, cools by natural convection, and connects through M17 SPEEDCON quick-lock plugs. A double-cable metal lead set separates power and feedback conductors, while a plain shaft without a sealing ring and the absence of a holding brake align with machines that rely on external mechanisms for static torque.
Rated data define continuous duty. At a supply range of 4.75 to 5.25 V for the encoder electronics, the drive delivers 0.4 kW at a rated speed of 3000 rpm. This corresponds to a rated torque of 1.27 Nm and requires 2.40 A rms. The winding, specified for 3000 min⁻¹, carries five pole pairs and presents a phase resistance of 1.74 Ω with a phase inductance of 9.80 mH; these values influence current rise and position-loop bandwidth. For short peaks the inverter may supply up to 7.23 A, allowing rapid moves before thermal limits. A torque constant of 0.52 Nm/A rms links commanded current to generated torque, and the rotor’s low inertia supports fast acceleration without overshoot.
Environmental and feedback features complete the profile. The housing meets IP65, so dust and water jets will not impair operation on open machine frames. Within an ambient span of 0 to 40 °C, the motor maintains continuous output while producing only 65 dB(A) of airborne noise. The unit weighs 1.52 kg, minimizing reflected inertia on small linear stages, and can develop a peak torque of 3.82 Nm for indexing or clamp motions. A 23-bit optical encoder supports single-turn and multiturn counting, feeding high-resolution position data to the control system through the dedicated feedback cable.
Technical Specifications
Connectors
M17; Quick lock SPEEDCON
Cooling Mode
Natural Convection
Encoder
Optical Encoder (23 Bit)
Encoder Design
Single/Multiturn
Frame Length
B
Frame Size
3
Holding Brake
Without Brake
Leadwire Cable
Double Cable Metal
Maximum Current (rms)
7.23 A
Maximum Torque
3.82 Nm
Operational Temp Range
0 to 40 Celsius
Phase Inductance
9.80 mH
Phase Resistance (20 °c)
1.74 Ohm
Pole Pairs
5
Product Group
Ultra Compact Motor
Protection Type
IP65
Rated Current (rms)
2.40 A
Rated Power
0.4 kW
Rated Speed
3000 rpm
Rated Torque
1.27 Nm
Rotor Inertia
Low Motor Inertia
Shaft
Plain Shaft, without shaft sealing ring
Sound pressure level
65 dB(A)
Supply Voltage Range
4.75 to 5.25 V
Torque Constant (20 °c)
0.52 Nm/A(rms)
Weight
1.52 kg
Winding
3000 min-1
Frequently Asked Questions
Internal Product Review
The MS2M03-B0FNN-KMDH0 from Bosch Rexroth Indramat is an ultra compact motor featuring a rated power of 0.4 kW and a rated speed of 3000 rpm, ideal for applications requiring efficient performance in limited spaces. It offers IP65 protection and utilizes an optical encoder with 23-bit resolution for precise feedback. The combination of natural convection cooling and low motor inertia makes this motor well-suited for demanding automation tasks.
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