Siemens MICROMASTER 440 VFD 11kW 200-240V 3-Phase 6SE6440-2UC31-1DA1

Siemens MICROMASTER 440 VFD 11kW – D-Size Industrial Vector Drive for Heavy Machinery

The Siemens MICROMASTER 440, model 6SE6440-2UC31-1DA1, delivers 11kW constant torque output power with 200-240V 3-phase input, with square-law torque rating extending to 15kW for pump and fan applications[reference:57]. This D-size unfiltered drive is designed for heavy machinery requiring the precision of vector control at higher power levels.

At 11kW, this drive handles output currents up to 42A, making it suitable for large industrial equipment where V/f control alone would be insufficient[reference:58]. The drive's sensorless vector control algorithm provides 100% torque down to 0.5 Hz, a critical capability for applications like mixers that need to maintain agitation during batch changes, extruders requiring stable throughput regardless of material viscosity, and positioning systems needing controlled acceleration.

The larger D-size chassis features enhanced heat dissipation and terminal blocks sized for heavier gauge conductors. This model is particularly well-suited for OEM equipment manufacturers building machinery for worldwide distribution, as the 200-240V input covers common voltage standards in many regions including North America (208V/240V), parts of Asia, and select South American countries.

Key Specifications:
- Output Power: 11 kW (constant torque) / 15 HP
- Square-Law Torque Power: 15 kW (pumps, fans, centrifugal loads)[reference:59]
- Input Voltage: 200-240V AC 3-phase, +10/-10%, 47-63Hz
- Rated Output Current: 42 A[reference:60]
- Output Frequency: 0-650 Hz
- Overload Capacity: 150% for 60 s, 200% for 3 s
- Protection Class: IP20
- Operating Temperature: -10°C to +50°C
- Dimensions (H×W×D): 520mm × 275mm × 245mm[reference:61]
- Weight: 16 kg[reference:62]
- Filter: Without built-in filter
- Frame Size: D

Typical Applications:
- Heavy industrial machinery and processing equipment
- Large extruders and compounding lines
- Industrial mixers (dough, chemical, pharmaceutical)
- Centrifuges and separators requiring controlled acceleration
- Large material handling systems and transfer lines
- Positive displacement pumps for viscous fluids
- Machine tool spindle drives (mills, lathes)

Key Features:
- Sensorless vector control provides 100% torque down to 0.5 Hz without encoder
- Built-in braking chopper for dynamic braking (external resistor required)
- BiCo technology for custom I/O configuration
- 6 digital inputs, 2 analog inputs, 2 analog outputs, 3 relay outputs
- Integrated Modbus RTU interface (RS-232 and RS-485)[reference:63]
- Flying restart captures spinning motors without fault conditions
- DC injection braking for zero-speed holding
- PID controller for closed-loop regulation
- 4 skip frequencies for resonance avoidance
- Automatic restart with configurable attempts
- Comprehensive protection functions

Vector Control Advantages at 11kW Level:
At this power level, the difference between V/f control and vector control becomes particularly significant. A mixer processing varying batch sizes may have torque requirements that double between light and heavy loads. Vector control automatically adjusts output to maintain commanded speed without stall conditions. For extruders producing different materials, torque demands vary significantly with material viscosity—vector control ensures consistent throughput without manual parameter adjustments.

Important Notes:
- This product is discontinued (PM410). Available ONLY as a spare part
- Requires 3-phase input only; 42A input current at full load requires careful supply sizing
- For new installations, SINAMICS G120 series is the recommended successor
- External braking resistor required for dynamic braking applications
- An operator panel (BOP or AOP) is required for parameter configuration

FAQ:

Q1: What is the actual output current for this 11kW model?
A: The rated output current is 42A at full load for constant torque applications[reference:64]. Input current requirements will be comparable; ensure supply wiring and protection are sized appropriately.

Q2: How does the 42A output current affect installation requirements?
A: At this current level, proper installation includes correctly sized supply conductors (consult local electrical code), appropriate branch circuit protection (circuit breaker or fuses), and consideration of voltage drop over longer supply runs.

Q3: Can this drive operate in higher ambient temperatures?
A: Rated operation is -10°C to 50°C at full rated current. For ambient temperatures up to 60°C, derating of output current is required (approximately 2.5% per °C above 50°C). Operation above 60°C is not recommended.

Q4: What is the difference between this 11kW model and the larger 15kW model?
A: Both share the same D-size chassis and mounting dimensions. The 15kW model (6SE6440-2UC31-5DA1) offers higher output current capacity for constant torque loads. Choose 15kW if your load consistently requires more than 42A; choose 11kW for loads within this range to maintain thermal margin.

📦 Spare Part – Limited Stock | Tech Support | Please confirm availability before ordering
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