Siemens 6SE6440-2AD37-5FA1 MICROMASTER 440 75 kW Inverter
High-power 380-480 V AC MICROMASTER 440 drive with 75 kW high-overload and 90 kW low-overload ratings.
01Technical Summary
Siemens 6SE6440-2AD37-5FA1 is a MICROMASTER 440 frequency converter for 380 to 480 V three-phase networks. The built-in Class A filter supports the documented EMC configuration, while the power stage is rated for 75 kW high-overload duty or 90 kW low-overload duty. The large frame includes fan cooling and configurable control I/O. Correct replacement depends on the exact overload class, motor current, cabinet design, line-side equipment, braking arrangement and stored parameter set.
02Specifications
| Manufacturer | Siemens |
|---|---|
| Article Number | 6SE6440-2AD37-5FA1 |
| Product Family | MICROMASTER 440 |
| Input Supply | 380 to 480 V AC, 3-phase, ±10% |
| Input Frequency | 47 to 63 Hz |
| Integrated Filter | Class A EMC filter |
| High-Overload Rating | 75 kW / 100 hp |
| Low-Overload Rating | 90 kW / 125 hp |
| Output Current | 145 A high overload; 178 A low overload |
| Input Current | 139 A high overload; 169 A low overload |
| Pulse Frequency | 4 kHz |
| Control I/O | 6 digital inputs, 3 relay outputs, 2 analog inputs, 2 analog outputs |
| Motor Sensor Input | PTC / KTY input |
| Cooling | Fan cooled |
| Protection | IP20 |
| Operator Panel | Supplied without AOP or BOP |
03Features
Key Functions
- Supports 75 kW high-overload duty and 90 kW low-overload duty from the same drive frame.
- Includes a Class A EMC filter in the exact article configuration.
- Provides six digital inputs and multiple relay and analog channels for application integration.
- Accepts motor-temperature feedback through the documented PTC/KTY input.
- Uses forced-air cooling for the high-power stage.
- Supports MICROMASTER 440 control functions and optional operator or communication accessories.
Identification
- Manufacturer: Siemens
- Model: 6SE6440-2AD37-5FA1
- Product Type: MICROMASTER 440 variable-frequency drive with integrated Class A filter
- Status: Cancelled product; spare part
04Compatibility
- Confirm a 380 to 480 V three-phase supply and all upstream protection, reactor, contactor and EMC requirements.
- Select the rating from the real high-overload or low-overload duty, not from motor kilowatts alone.
- Check the motor full-load current against the documented 145 A or 178 A output-current class.
- Verify cabinet space, lifting method, airflow, heat rejection and service access for the 1150 mm-high unit.
- Retain the complete I/O assignment, PTC/KTY wiring, communication option and parameter backup.
- Review braking components, DC-link arrangements and cable lengths against the installed application.
05Replacement
- Siemens records product cancellation from 1 October 2019 and identifies the article as a spare part.
- Migration information is referenced through Siemens SIOS entry 109746454.
- A current drive must be engineered for overload class, motor current, supply, control method, I/O, communications and mechanical installation.
- Record parameters, option-board details, line-side components, motor data and protection settings before removal.
- Commission the replacement under controlled load and verify cooling, current, motor direction, torque response, interlocks and all process sequences.
06FAQ
What duty ratings are assigned to 6SE6440-2AD37-5FA1?
The official data lists 75 kW for high-overload duty and 90 kW for low-overload duty.
Which line voltage does this drive accept?
It is designed for 380 to 480 V AC three-phase input with a ±10% tolerance.
How much output current can the unit deliver?
Siemens lists 145 A in high-overload operation and 178 A in low-overload operation.
Which onboard control connections are available?
The documented I/O includes six digital inputs, three relay outputs, two analog inputs, two analog outputs and a PTC/KTY input.
What are the cabinet-relevant size and mass?
The documented dimensions are 350 x 1150 x 320 mm and the net weight is 75 kg.
Is the article still a current production product?
No. Siemens records it as cancelled and available in the spare-part lifecycle, subject to current availability.
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