Siemens MICROMASTER 440 VFD 1.1kW 200-240V 3-Phase 6SE6440-2UC21-1BA1

Siemens MICROMASTER 440 VFD 1.1kW – B-Size Vector Drive for Expanded Capability

The Siemens MICROMASTER 440, model 6SE6440-2UC21-1BA1, delivers 1.1kW output power with 200-240V 3-phase input. This unfiltered drive represents the entry point to the larger B-size chassis within the MM440 series, offering increased power handling, expanded I/O, and enhanced thermal management compared to the A-size models [9†L10-L11].

Key Specifications:
- Output Power: 1.1 kW (constant torque) / 1.5 HP
- Input Voltage: 200-240V AC 3-phase, +10/-10%, 47-63Hz
- Rated Output Current: Approx. 6.0 A
- Output Frequency: 0-650 Hz
- Overload Capacity: 150% for 60s, 200% for 3s
- Protection Class: IP20
- Operating Temperature: -10°C to +50°C
- Dimensions (H×W×D): 202mm × 149mm × 172mm [13†L5]
- Weight: Approx. 3.3 kg [13†L6]
- Filter: Without built-in filter
- Frame Size: B

Typical Applications:
- Industrial conveyor systems
- Small to medium pumps
- Industrial fan arrays
- Small extruders and mixers
- Packaging machinery main drives
- Small compressors

Key Features:
- Sensorless vector control
- Linear and Quadratic V/f control
- Built-in PID controller
- 6 digital inputs, 2 analog inputs, 2 analog outputs, 3 relay outputs
- BiCo technology for flexible configuration
- Integrated RS-485 Modbus RTU interface
- Built-in braking chopper
- DC injection and compound braking
- Flying restart function
- Efficiency: 96-97% [13†L7-L8]

B-Size Chassis Advantages:
The B-size chassis (202×149×172mm) provides increased thermal dissipation capacity, allowing continuous operation at higher power levels. The expanded I/O terminal layout simplifies wiring for complex applications requiring multiple sensors and actuators. The larger enclosure also accommodates a wider range of optional communication modules.

Important Notes:
- This product is discontinued. Available ONLY as a spare part
- This model requires 3-phase input only
- An operator panel (BOP 6SE6400-0BP00-0AA1 or AOP 6SE6400-0AP00-0AA1) is required for parameter changes
- For new installations, Siemens recommends the SINAMICS G120 series

FAQ:

Q1: What is the difference between AA1 and BA1 suffixes?
A: AA1 suffix indicates A-size chassis (173×73×149mm) with 0.12-0.75kW power ratings. BA1 suffix indicates B-size chassis (202×149×172mm) with 1.1-2.2kW power ratings. BA1 models offer greater thermal dissipation capacity and expanded wiring space.

Q2: What is the typical power factor of this drive?
A: Power factor is ≥0.95 [13†L7-L8], contributing to good power quality and minimizing harmonic distortion on the supply network.

Q3: What is the output frequency range in vector control mode?
A: In V/f control mode, output frequency ranges 0-650Hz. In sensorless vector control mode, practical output frequency range is 0-200Hz [13†L7-L8] for optimal torque performance.

Q4: Can this drive operate on 1-phase input?
A: No. Models with 1.1kW and above in the MM440 series require 3-phase input and do not support single-phase operation [13†L6-L7]. For single-phase applications up to 3kW, use the smaller A-size models.

Q5: Does this drive support PROFIBUS communication?
A: Standard RS-485 Modbus RTU is built-in. Optional PROFIBUS DP module (6SE6400-1PB00-0AA0) can be added to integrate this drive into PROFIBUS networks.

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