Description
Lenze MCS 12H35-RS0B0-B19N-ST5S00N-R0SU | 2.8kW Servo Motor
The Lenze MCS 12H35-RS0B0-B19N-ST5S00N-R0SU is a high-speed compact servo motor from the Lenze MCS family. The available part references identify this exact configuration as a 2.8 kW servo motor rated at 325 VAC and 3,525 rpm, with a resolver feedback system and no holding brake.
The long Lenze type code is important here. Do not reduce the purchasing description to simply “MCS12H35 servo motor.” Other MCS12H35 configurations exist with different shaft, feedback, brake and winding characteristics. For example, another MCS12H35 listing carries a different A19N configuration and a different material number, demonstrating why the complete suffix should remain on the RFQ.
The RS0B0 portion identifies an important feedback/brake configuration: available listings specify RS0 resolver feedback and no holding brake. The exact suffix also includes the B19N mechanical configuration, which should be matched against the motor nameplate and machine documentation before substitution.
For legacy machine maintenance, this is the type of motor where a superficially similar MCS motor can create commissioning problems. The drive has to support the motor’s electrical data and resolver feedback, while the mechanical interface must match the machine.
MCS 12H35-RS0B0-B19N-ST5S00N-R0SU
Key Technical Specifications
- Manufacturer: Lenze
- Series: MCS
- Exact type: MCS 12H35-RS0B0-B19N-ST5S00N-R0SU
- Material number: 15033246
- Motor category: Compact servo motor
- Rated output: 2.8 kW
- Rated power: Approximately 3.76 HP
- Rated torque: 7.5 Nm
- Rated speed: 3,525 rpm
- Rated voltage: 325 VAC
- Rated frequency: 235 Hz
- Rated current: 5.7 A
- Feedback: RS0 resolver
- Holding brake: None
- Motor protection: KTY83 + PTC
- Protection: IP54
- Insulation class: F
- Shaft: 19 × 40 mm
- Keyway: No feather key
- Country of origin: Germany
These figures are supported by current industrial-part listings for the exact or matching Lenze configuration.
Mechanical Identification
The B19N portion of the full designation should not be ignored. Mechanical dimensions and shaft configuration are part of the substitution decision.
One current technical listing identifies the shaft as 19 × 40 mm without feather key.
Before replacing an installed motor, compare:
- Shaft diameter
- Shaft length
- Key/keyless arrangement
- Mounting flange
- Pilot diameter
- Overall motor length
- Connector orientation
- Cable/connector configuration
- Machine coupling
- Load-side alignment
A motor that matches electrically but requires a different coupling or shaft arrangement is not a drop-in replacement.
Resolver Feedback and Drive Compatibility
The RS0 feedback designation is one of the most important details in this part number.
Available listings identify the exact motor as using a resolver, rather than an encoder.
That means the replacement drive must be configured for the appropriate Lenze motor/resolver combination. Do not assume that another MCS motor with a superficially similar power rating can be substituted simply because its connector fits.
Before energizing a replacement, verify:
- Servo-drive model
- Motor database/configuration
- Resolver interface
- Resolver wiring
- Motor temperature-sensor input
- Rated current
- Rated speed
- Motor voltage
- Motor phase sequence
- Feedback polarity/configuration
- Machine-specific acceleration/deceleration limits
For an existing Lenze machine, the drive’s stored motor configuration is often as important as the motor nameplate itself.
Global Sourcing & Incoming-Test SOP
For the supplied eBay unit, the seller currently describes it as used and “GOOD CONDITION.” The listing does not establish that the specific motor has passed a documented winding, resolver or dynamic-load test.
Recommended incoming procedure:
- Photograph the complete motor nameplate.
- Confirm the full designation:
MCS 12H35-RS0B0-B19N-ST5S00N-R0SU - Record material number 15033246 if present.
- Record serial number and manufacturing information.
- Check the nameplate against the supplier’s photographs and purchase documentation.
- Inspect the housing for impact damage, cracks and corrosion.
- Inspect the shaft for scoring, corrosion and coupling damage.
- Check shaft rotation manually for abnormal roughness or mechanical binding.
- Inspect bearings for excessive radial or axial play.
- Inspect the resolver connector and pins for damage or contamination.
- Check the motor cable/connector arrangement against the existing machine.
- Measure phase-to-phase winding resistance and compare the three phases for consistency.
- Perform insulation-resistance testing using a test procedure appropriate for the motor and manufacturer requirements.
- Test the resolver excitation and feedback circuits with suitable equipment.
- Verify KTY83/PTC temperature-sensor circuits.
- If practical, run the motor on a compatible servo drive under controlled conditions.
- Check no-load current, speed feedback, abnormal noise and vibration.
- Record the test conditions and results.
- Preserve the motor with appropriate packaging and shaft protection for shipment.
Important: This is a recommended incoming inspection and test SOP. It does not mean that the specific eBay motor has undergone these tests.
Field Engineer’s Pitfall Guide
1. Do not buy on “MCS12H35” alone.
The MCS12H35 family contains multiple configurations. A current listing for an A19N version, for example, shows a different complete type code and material number.
For a replacement, quote the entire:
MCS 12H35-RS0B0-B19N-ST5S00N-R0SU
along with the material number where available.
2. Resolver feedback must match the drive.
The exact configuration uses an RS0 resolver. Replacing it with an encoder-feedback motor or another feedback variant without checking the drive configuration can result in feedback faults or incorrect commutation.
3. No holding brake means no mechanical parking function from the motor.
The documented configuration has no holding brake.
If the machine relies on a motor brake for vertical-axis holding, gravity-load retention or safe stopping, do not assume this motor provides that function. Check the machine’s external braking arrangement.
FAQ
Q: What is Lenze MCS 12H35-RS0B0-B19N-ST5S00N-R0SU?
A: It is a Lenze MCS-series compact servo motor. Available technical references identify the exact configuration as a 2.8 kW, 325 VAC, 3,525 rpm motor with RS0 resolver feedback.
Q: What is the Lenze material number?
A: The exact configuration is listed under 15033246.
Q: What is the rated torque?
A: Available technical listings specify 7.5 Nm rated torque.
Q: Does this Lenze MCS motor have a brake?
A: No. The matching technical listings identify the configuration as without holding brake.
Q: What feedback does the motor use?
A: It uses an RS0 resolver. The resolver configuration must be matched to the installed servo drive and its motor parameters.
Q: What is the motor’s protection rating?
A: The available specifications identify it as IP54, with Class F insulation.
Q: Is the eBay motor tested?
A: The supplied listing identifies it as used and describes the condition as “GOOD CONDITION.” That is not equivalent to a documented electrical or dynamic functional test.
Q: Is this Lenze motor still readily available from the OEM?
A: Radwell currently lists this exact configuration as discontinued by the manufacturer, while surplus suppliers continue to list new, used or refurbished examples. That makes exact-part-number verification particularly important when building a maintenance spare.
Q: What should I request from a surplus supplier?
A: Request a clear nameplate photograph, confirmation of , material number 15033246, serial number, shaft condition, resolver condition and an actual motor test report if the seller claims the unit is tested.
