Siemens MICROMASTER 440 VFD 0.12kW 200-240V 1/3-Phase 6SE6440-2UC11-2AA1

Siemens MICROMASTER 440 VFD 0.12kW – Compact Vector Drive for Precision Applications

The Siemens MICROMASTER 440, model 6SE6440-2UC11-2AA1, delivers 0.12kW output power with 200-240V 1/3-phase input. This unfiltered micro drive is the smallest power rating in the MM440 series, specifically engineered for applications demanding high dynamic response and precision speed control. Unlike the MICROMASTER 420 series designed for basic V/f control, the MM440 series incorporates advanced vector control technology, providing superior torque performance even at low speeds [20†L21-L23].

Key Specifications:
- Output Power: 0.12 kW (constant torque)
- Input Voltage: 200-240V AC 1/3-phase, +10/-10%, 47-63Hz
- Input Current: 1.8 A
- Rated Output Current: 0.9 A
- Output Frequency: 0-650 Hz
- Overload Capacity: 150% for 60s, 200% for 3s
- Protection Class: IP20
- Operating Temperature: -10°C to +50°C
- Storage Temperature: -40°C to +70°C
- Dimensions (H×W×D): 173mm × 73mm × 149mm
- Weight: 1.3 kg [8†L23]
- Filter: Without built-in filter
- Frame Size: A

Typical Applications:
- Small precision indexing tables
- Miniature conveyor systems
- Laboratory mixing equipment
- Small packaging machinery
- Textile winding machines
- Small fan and blower control

Key Features:
- Sensorless vector control for superior low-speed torque
- Linear and quadratic V/f control modes
- Built-in PID controller for closed-loop regulation
- 6 digital inputs, 2 analog inputs, 2 analog outputs, 3 relay outputs
- BiCo technology for flexible I/O configuration
- Integrated RS-485 Modbus RTU interface (RS-232 also available) [7†L12]
- Optional PROFIBUS-DP communication module
- Built-in braking chopper (external resistor required for dynamic braking)
- Flying restart for spinning motor capture
- DC injection braking and compound braking

Why Choose MM440 Over MM420?
The MICROMASTER 440 series is designed for applications requiring higher dynamic response and broader functionality. While MM420 offers reliable V/f control for constant torque applications, MM440 adds sensorless vector control, delivering consistent high torque performance even under sudden load changes. The MM440 also provides more flexible I/O configuration through BiCo technology and supports advanced control strategies including torque control and positioning applications [20†L21-L23].

Important Notes:
- This product is discontinued. Available ONLY as a spare part
- A Basic Operator Panel (BOP) or Advanced Operator Panel (AOP) is required for parameter changes beyond factory defaults
- For new installations, Siemens recommends the SINAMICS G120 series as the successor

FAQ:

Q1: What is the difference between MM420 and MM440?
A: MM420 is designed for basic V/f control applications (conveyors, pumps, fans). MM440 adds sensorless vector control, providing superior torque performance at low speeds and better dynamic response under load changes. MM440 is suitable for more demanding applications like positioning and torque control.

Q2: Can this drive operate on single-phase input?
A: Yes. This model accepts both single-phase and three-phase 200-240V input, making it suitable for facilities with only single-phase power available. Note that output current ratings may differ between single-phase and three-phase operation.

Q3: Does this include a braking transistor?
A: Yes. MM440 series includes a built-in braking chopper. An external braking resistor (order separately) is required for dynamic braking applications requiring rapid deceleration.

Q4: What is the maximum motor cable length?
A: For shielded cable: up to 50 meters. For unshielded cable: up to 100 meters. For longer runs beyond these limits, an output reactor is recommended to protect motor windings from reflected wave voltage spikes.

Q5: Is this product still in production?
A: No. MICROMASTER 440 series has been discontinued. This model is available ONLY as a spare part while stocks last. For new designs, Siemens recommends the SINAMICS G120 series.

📦 Spare Part – Limited Stock | Tech Support | Please confirm availability before ordering
Contact us for pricing and availability.
 

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