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MicroMaster 440 Series 6SE6440 Frequency Converter Inverter 380-480V, 5.5kW/7.5kW, PROFIBUS-DP Supported
MicroMaster 440 Series 6SE6440 Frequency Converter Inverter 380-480V, 5.5kW/7.5kW, PROFIBUS-DP Supported
Specifications
Model Number :
440
Place of Origin :
Germany
MOQ :
1
Price :
$100 - $6000
Payment Terms :
L/C,D/A,D/P,T/T,Western Union,MoneyGram
Delivery Time :
3-5Workday
Product name :
Frequency Converter Inverter
Rated Power :
200-240V（0.12kW - 45kW），380-480V（0.37kW - 200kW）
Level Of Protection :
IP20
Pakage :
Original Pakage
Warranty :
Original Factory Warranty
Shipping term :
International Express（DHL/FEDEX/TNT/UPS/ARAMEX）/ Sea Freight / Air Freight / International Special Line
Description
MicroMaster 440 Series Frequency Converter
The MicroMaster 440 family represents a high-performance general-purpose AC frequency converter engineered for demanding industrial applications. With precise speed control, stable operation, and flexible adaptability, it has become the preferred choice for industrial users worldwide. Compatible with both constant torque and variable torque (quadratic law) loads, it covers diverse needs from general machinery to process industries. The compact design and comprehensive protection functions ensure reliable operation even in harsh working conditions.
Technical Specifications
Power Input Parameters
Parameter Details
Input Voltage 200-240V±10% (1-phase/3-phase); 380-480V±10% (3-phase); 500-600V±10% (3-phase)
Input Frequency 47-63Hz
Core Output Parameters
Parameter Details
Output Frequency Range 0-650Hz
Output Power Range 200-240V 1-phase: Constant torque 0.12-3kW, Variable torque 0.12-4kW;
200-240V 3-phase: Both constant torque and variable torque 0.12-45kW;
380-480V 3-phase: Constant torque 0.37-75kW, Variable torque 0.55-90kW
Frequency Resolution 0.01Hz for digital setting and serial communication; 10-bit precision for analog setting
PWM Frequency 2-16kHz (adjustable in 2kHz steps)
Control Performance Parameters
Parameter Details
Control Modes Sensorless Vector Control, Closed-Loop Vector Control, Closed-Loop Torque Control; Linear V/F Control, Quadratic V/F Control, Programmable Multi-point V/F Control
Overload Capacity 200% rated load current for 3 seconds; 150% rated load current for 60 seconds
Special Control Functions Built-in PID controller (auto-tuning); 15 programmable fixed frequencies, 4 programmable skip frequencies; Supports master/slave control and automatic restart
I/O Interface Parameters
Parameter Details
Digital Inputs 6 channels, freely programmable, PNP/NPN selectable
Analog Inputs 2 channels, compatible with 0-10V, 0-20mA, -10 to +10V signals
Analog Outputs 2 channels, programmable to output signals corresponding to operating parameters
Relay Outputs 3 channels, resistive load 30V DC/5A, inductive load 250V AC/2A
Protection Parameters
Parameter Details
Protection Types Overvoltage/Undervoltage Protection, Inverter & Motor Overheating Protection, Earth Fault Protection, Short-Circuit Protection, Locked Rotor Protection, Stall Prevention; Parameter interlock (PIN code protected)
Motor Overload Factor Adjustable via parameter P0640 (percentage configurable)
Physical & Environmental Parameters
Parameter Details
Protection Class IP20 (suitable for cabinet mounting)
Operating Temperature -10℃ - 50℃ (operating); -40℃ - 70℃ (storage)
Mounting Method Wall-mounted, compact design (dimensions vary by power rating; e.g., 55kW model without filter: 850mm*350mm*320mm)
Communication Parameters
Parameter Details
Standard Interface Integrated RS485 communication port
Optional Modules PROFIBUS-DP, DeviceNet communication modules, seamless integration with Siemens S7 series PLCs
Model Specifications
200-240V (1-phase/3-phase) Models
Model Rated Power Key Specifications
6SE6440-2UC11-2AA1 0.12kW 3-phase or single-phase input, protection class IP20
6SE6440-2UC12-5AA1 0.25kW 3-phase or single-phase input, suitable for general light-load machinery
6SE6440-2UC13-7AA1 0.37kW 3-phase or single-phase input, widely used in small pumps and fans
6SE6440-2UC15-5AA1 0.55kW 3-phase or single-phase input, stable operation under variable frequency conditions
6SE6440-2UC17-5AA1 0.75kW 3-phase or single-phase input, with good dynamic response performance
6SE6440-2UC21-1BA1 1.1kW 3-phase or single-phase input, suitable for medium-power small mechanical equipment
6SE6440-2UC21-5BA1 1.5kW 3-phase or single-phase input, applicable to small-scale transmission systems
6SE6440-2UC22-2BA1 2.2kW 3-phase or single-phase input, strong overload capacity
6SE6440-2UC23-0CA1 3kW 3-phase or single-phase input, adaptable to complex load changes
6SE6440-2UC24-0CA1 4kW 3-phase or single-phase input, suitable for general industrial occasions
6SE6440-2UC25-5CA1 5.5kW 3-phase or single-phase input, matching with constant torque loads
6SE6440-2UC27-5DA1 7.5kW 3-phase or single-phase input, applicable to equipment requiring high torque at low speed
6SE6440-2UC31-1DA1 11kW 3-phase or single-phase input, compatible with PROFIBUS-DP communication expansion
6SE6440-2UC31-5DA1 15kW 3-phase or single-phase input, suitable for medium-sized fan and pump equipment
6SE6440-2UC31-8EA1 18.5kW 3-phase or single-phase input, with reliable over-current and over-temperature protection
6SE6440-2UC32-2EA1 22kW 3-phase or single-phase input, suitable for heavy-duty transmission scenarios
6SE6440-2UC33-0FA1 30kW 3-phase or single-phase input, meeting the needs of large-flow water treatment equipment
6SE6440-2UC33-7FA1 37kW 3-phase or single-phase input, with excellent vector control performance
6SE6440-2UC34-5FA1 45kW 3-phase or single-phase input, suitable for high-power general machinery
380-480V (3-phase) Models
Model Rated Power Key Specifications
6SE6440-2UD13-7AA1 0.37kW 3-phase input, suitable for small-power constant torque equipment
6SE6440-2UD15-5AA1 0.55kW 3-phase input, reliable operation in industrial environments such as workshops
6SE6440-2UD17-5AA1 0.75kW 3-phase input, applicable to small-scale conveyor belts and compressors
6SE6440-2UD21-1AA1 1.1kW 3-phase input, with good low-speed torque output performance
6SE6440-2UD21-5AA1 1.5kW 3-phase input, compatible with multiple communication protocols for easy integration into industrial control systems
6SE6440-2UD22-2BA1 2.2kW 3-phase input, strong overload capacity, suitable for medium-load mechanical transmission
6SE6440-2UD23-0BA1 3kW 3-phase input, compact structure, easy to install in cabinets
6SE6440-2UD24-0BA1 4kW 3-phase input, suitable for general-purpose machinery with variable load requirements
6SE6440-2UD25-5CA1 5.5kW 3-phase input, constant torque output, applicable to process industrial equipment
6SE6440-2UD27-5CA1 7.5kW 3-phase input, square-law torque output can be upgraded, suitable for fans and pumps
6SE6440-2UD31-1CA1 11kW 3-phase input, stable operation under high-frequency conditions, suitable for high-speed machinery
6SE6440-2UD31-5DA1 15kW 3-phase input, good dynamic response, applicable to heavy-duty transmission equipment
6SE6440-2UD31-8DA1 18.5kW 3-phase input, with multiple protection functions to ensure safe operation
6SE6440-2UD32-2DA1 22kW 3-phase input, suitable for large-scale conveyor systems and compressors
6SE6440-2UD33-0EA1 30kW 3-phase input, applicable to medium-sized process industrial equipment such as water treatment devices
6SE6440-2UD33-7EA1 37kW 3-phase input, strong load-bearing capacity, suitable for high-power pumps and fans
6SE6440-2UD34-5FA1 45kW IP20 protection class, 150% overload for 60 seconds, 200% overload for 3 seconds
6SE6440-2UD35-5FA1 55kW 3-phase input, no filter, suitable for high-power constant torque industrial scenarios
6SE6440-2UD41-3GA1 132kW 3-phase input, large power output, applicable to large-scale industrial compressors and fans
6SE6440-2UD42-0GA1 200kW 3-phase input, high-power industrial grade, suitable for large-scale transmission and process systems
Industry Applications
  • General Machinery Manufacturing: Conveyors, packaging machines, printing machines, CNC machine tool spindle/feed systems
  • Process Industry: Chemical reactor agitation, pharmaceutical material handling, food processing line speed control
  • Water Treatment: Frequency control for water pumps (constant pressure water supply, sewage treatment aeration pumps)
  • HVAC: Speed control for large fans and cooling tower fans
  • Metallurgy & Mining: Speed control for small conveyors and feeders
Frequently Asked Questions
Installation & Wiring
Q1: The inverter is installed in a control cabinet. Why does it trigger an overheating fault (F0004) as soon as it starts?
A1: The most likely cause is insufficient heat dissipation:
  • Check ventilation space: MM440 requires at least 10cm of clearance above and below—don't stack it with other heat-generating equipment
  • Verify the cooling fan: If the fan doesn't run during operation, it's faulty and needs replacement
  • Reduce PWM frequency: If the ambient temperature exceeds 50℃, either install a cooling fan in the cabinet or lower the inverter's PWM frequency (default is 4kHz; adjusting to 2kHz reduces heat generation)
Q2: I'm using a USB-to-RS232 cable to connect my computer to the inverter, but I can't connect to Starter software. What's wrong?
A2: This is the most common issue for overseas customers!
  • Replace the cable: Cheap USB-to-RS232 adapters are often incompatible with industrial equipment. Use an adapter with an FTDI chip for better stability
  • Check parameter settings: In the inverter, set P2010=6 (USS communication baud rate) and P2011=0 (address). Ensure the DIP switches on the connection kit are correctly set per the manual (Switch 1 ON, Switch 2 OFF)
  • Use a native serial port: Older computers with built-in serial ports are more reliable than USB adapters. For best results, use a PROFIBUS communication card—much more stable than USS communication
Q3: How to handle grounding during installation? I heard someone burned their inverter due to poor grounding.
A3: Grounding is critical!
  • Connect the inverter's PE (grounding terminal) to a dedicated grounding bar with a grounding resistance ≤4Ω
  • Use a ground wire with a cross-section at least equal to the inverter's input/output wires—never bundle it with power cables
A customer once burned multiple MM440 units in their Shanghai factory. The root cause was excessive grounding resistance, which prevented surge discharge during power grid fluctuations, damaging internal components. Adding a dedicated ground wire resolved the issue.
Operation & Troubleshooting
Q4: The inverter trips suddenly during operation, displaying F0002 (overvoltage). What's the cause?
A4: Overvoltage is usually related to too-fast deceleration or unstable grid voltage:
  • If tripping occurs during motor deceleration, increase the deceleration time (parameter P1121). For high-inertia loads like fans/pumps, rapid deceleration turns the motor into a generator, charging the inverter's DC bus and causing overvoltage. Install a braking resistor if necessary
  • If the grid voltage is too high (exceeding 480V), add an input reactor or set the inverter's input voltage parameter (P0210) to the actual grid voltage
Q5: The motor vibrates at startup, lacks torque, and can't even drive the rated load. How to fix this?
A5:
  • Verify motor parameters: Ensure P0307 (motor rated power) and P0305 (motor rated current) are correctly set. For example, entering 7.5kW motor parameters into a 5.5kW inverter will result in insufficient torque
  • Change control mode: For heavy-load startup, switch from V/F control to Sensorless Vector Control (set P0700=21) for significantly improved torque
  • Check cable length: If the motor cable exceeds 50m, increase the cable cross-section or install an output reactor
Q6: The input power contactor trips frequently, and the inverter displays F0003 (undervoltage). Is the inverter faulty?
A6: It's almost never the inverter! The issue is likely with the contactor:
  • Either the contactor coil is aging (insufficient suction, causing power loss during operation) or the control circuit voltage is unstable (triggering false tripping)
Try replacing the contactor or checking for loose wiring in the control circuit—many customers resolved the problem this way without needing to repair the inverter.
Q7: The inverter shuts down suddenly without error codes, but works normally after restart. What's happening?
A7:
  • Check grid voltage: Use a multimeter to measure the input voltage during operation—if it drops significantly below 380V, that's the cause
  • Verify auto-shutdown settings: Ensure P1070 (control source) is correctly configured, and check for loose external terminal connections (which can trigger false shutdowns)
  • Inspect braking resistor: For models with a built-in braking chopper, overheating of the braking resistor can cause temporary shutdowns—normal operation resumes after cooling
Maintenance & Compatibility
Q8: MM440 is discontinued. I can't find spare parts when it breaks down. What should I do?
A8: Although MM440 is discontinued, Siemens still provides spare parts support—common components like cooling fans, power modules, and communication modules are available. If the mainboard is faulty, repair costs are high. We recommend upgrading directly to the G120 series:
  • G120 is compatible with MM440 in terms of installation dimensions, wiring, and parameters (importable via Starter software), requiring no control cabinet modifications. Many customers have adopted this upgrade path
Q9: The inverter's fan noise has become increasingly loud after years of use. Does it need replacement?
A9: Yes, definitely! Fans are wear parts and typically last 3-5 years. Loud noise indicates worn bearings—failure to replace will soon lead to fan stoppage and inverter overheating trips.
  • Ensure model compatibility when replacing (e.g., FS-A and FS-B fans are not interchangeable)
  • Always disconnect power and wait for the DC bus voltage to drop to 0V before replacement—safety first!
If your issue isn't listed here (e.g., specific error codes like F0011/F0021, special load adaptation, or certification documentation for customs clearance), provide detailed scenarios for tailored solutions!
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MicroMaster 440 Series 6SE6440 Frequency Converter Inverter 380-480V, 5.5kW/7.5kW, PROFIBUS-DP Supported

Ask Latest Price
Product Detail
Model Number :
440
Place of Origin :
Germany
MOQ :
1
Price :
$100 - $6000
Payment Terms :
L/C,D/A,D/P,T/T,Western Union,MoneyGram
Delivery Time :
3-5Workday
Contact Supplier
MicroMaster 440 Series 6SE6440 Frequency Converter Inverter 380-480V, 5.5kW/7.5kW, PROFIBUS-DP Supported

Shanghai Fradwell Industrial Automation Co., Ltd.

Verified Supplier
1 Years
shanghai, shanghai
Business Type :
Manufacturer, Exporter
Main Products :
PLC Programmable Logic Controllers, HMI Touch Screen, PCB Control Board
Certification Level :
Verified Supplier
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