Description
LENZE ESMD113L4TXH509 400/480 V AC Drive
Product Introduction
When a production machine has been running for years, the drive itself can become the weak link in an otherwise perfectly serviceable system. The LENZE ESMD113L4TXH509 belongs to the SMD inverter family and provides variable-frequency motor control for industrial equipment where maintaining the existing drive architecture is often more practical than redesigning the machine around a current-generation inverter.
This model is specified at 11.0 kW and is associated with a 3-phase 400/480 V supply and IP20 enclosure rating. Service organizations continue to list the ESMD113L4TXH509 specifically for replacement, repair, and refurbished-part requirements, which is consistent with its legacy status.
One procurement detail matters: ESMD113L4TXH509 is the complete model designation. Do not substitute another ESMD113-family drive solely because it has the same nominal horsepower. Input class, hardware revision, control configuration, and OEM machine implementation must all be checked.
ESMD113L4TXH509
Key Technical Specifications
- Manufacturer: LENZE
- Exact Model: ESMD113L4TXH509
- Drive Family: SMD
- Product Type: Frequency inverter / AC motor drive
- Rated Output Power: 11.0 kW
- Approximate Horsepower Class: 15 HP
- Input Supply: 3-phase AC
- Nominal Input Voltage: 400/480 VAC
- Protection Rating: IP20
- Configuration: OEM variant
- Application: Industrial variable-speed motor control
- Drive Technology: PWM-based variable-frequency AC drive architecture
- Installation: Control-cabinet / protected electrical enclosure application
- Product Status: Reported EOP April 30, 2019
- Replacement Context: Legacy machine maintenance and drive replacement
- Weight: Approximately 1.82 kg according to a service-part listing
- Country of Origin: Reported as United States by one service source
The 11.0 kW, 400/480 V, IP20 identification is independently repeated by service/distribution sources.
Important specification boundary: I would not publish a specific output-current value, overload percentage, switching-frequency limit, digital-I/O count, analog-I/O count, fieldbus protocol, or braking specification for this exact ESMD113L4TXH509 without the corresponding SMD manual/nameplate documentation. A current third-party page assigns several such values to this model, but the available evidence does not establish those details strongly enough for a procurement-grade listing.
Application Scenarios & Pain Points
Legacy Conveyor Systems
The is a logical candidate for machines where a failed inverter has stopped an existing conveyor or material-handling system. Retaining the original drive family can avoid unnecessary changes to motor wiring, control logic, commissioning parameters, and operator procedures.
Pumps and Fans
Variable-frequency drives are commonly used for pump and fan applications where motor speed must track process demand rather than run continuously at full line frequency.
Production Machinery
The 11 kW power class fits a substantial range of industrial machinery, including process equipment, conveyors, fans, pumps, and other motor-driven loads.
OEM Machine Replacement
The OEM variant designation deserves attention. A replacement drive may have the correct electrical family but still require verification against the original machine’s parameter set, terminal configuration, enclosure arrangement, and control interface.
Legacy Spare Strategy
For equipment that cannot economically be migrated immediately, maintaining a tested spare can reduce the exposure created by an obsolete drive platform.
QA & Live Testing SOP
For a legacy inverter, I would not accept a basic “powers on” test as sufficient.
- Nameplate verification: Confirm
LENZEdirectly from the drive label. - Model-code inspection: Record the complete suffix, including
L4TXH509. - Physical inspection: Check the enclosure, terminal blocks, cooling path, fan area, mounting points, and heat-sink surfaces.
- Capacitor inspection: Look for swelling, leakage, discoloration, or other evidence of DC-bus capacitor deterioration.
- PCB inspection: Examine the control electronics for contamination, corrosion, damaged components, cracked solder joints, and previous repair work.
- Power-stage inspection: Check for visible damage around the inverter power components and DC-bus section.
- Low-risk electrical checks: Verify appropriate resistance/continuity conditions before applying three-phase power.
- Powered test: Apply the correct three-phase supply under controlled test conditions.
- Display/control test: Verify that the drive initializes without unexplained fault indications.
- Motor test: Where the correct motor and test setup are available, verify controlled acceleration, steady-state operation, deceleration, and fault response.
- Thermal observation: Monitor abnormal heating during a sustained functional test.
- Parameter backup: If the original machine drive is still accessible, capture its parameters before replacing it.
For a discontinued inverter, parameter preservation is often as important as the hardware itself. A physically compatible drive can still create commissioning problems if the motor data and machine-specific settings are not recovered.
Field Engineer’s Pitfall Guide
❗ Do not confuse the SMD platform with LENZE 9300 Vector or servo products. Some secondary listings incorrectly group the with other LENZE drive families. The exact model is identified by service sources as an SMD frequency inverter.
❗ Do not substitute by power rating alone. An 11 kW inverter with a different input class, hardware generation, or control architecture is not automatically a drop-in replacement.
❗ Check the 400/480 V class carefully. The is identified with 3-phase 400/480 V service. Confirm the machine’s actual incoming supply before commissioning.
❗ IP20 means protected installation. This is not a drive to be treated as an open-field outdoor enclosure. The installation environment, cabinet ventilation, contamination level, and cooling clearance must be appropriate for an IP20 inverter.
❗ Capture the old drive parameters before removal. Motor rated voltage, current, frequency, acceleration/deceleration times, minimum/maximum frequency, control source, and machine-specific settings should be documented whenever the existing unit is still accessible.
Intent-Driven FAQ
What is the LENZE ?
The is an SMD-series frequency inverter designed for variable-speed control of industrial AC motors.
What is the power rating of ?
The documented rating is 11.0 kW, placing it in approximately the 15 HP class.
What input voltage does use?
Available service documentation identifies the model with 3-phase 400/480 VAC input.
What is the enclosure rating?
The is identified as IP20. It should therefore be installed in an appropriately protected electrical environment.
Is the discontinued?
Yes. A service source reports an end-of-production date of April 30, 2019. This makes the model particularly relevant to legacy-equipment repair and spare-parts procurement.
Is a servo drive?
No. It is identified as an SMD frequency inverter. Do not confuse it with LENZE’s 9300-series servo/vector products.
What should I verify before buying an ?
Verify the complete model number, 11 kW rating, 400/480 V three-phase class, OEM configuration, physical terminal arrangement, hardware condition, and compatibility with the machine’s existing motor-control parameters.
Procurement Note
LENZE is best treated as a legacy SMD drive replacement, not as a generic 11 kW inverter. The exact model designation and OEM configuration should be matched before installation. Its reported 2019 end-of-production status also makes condition, testing, and traceability important when sourcing surplus or refurbished stock.
For a critical machine, the preferred replacement workflow is straightforward: photograph the existing nameplate, record the complete model code, save the drive parameters, verify the motor nameplate, and then match the replacement hardware before energizing the system.
