Siemens MICROMASTER 440 VFD 2.2kW 200-240V 1/3-Phase 6SE6440-2UC22-2BA1

Siemens MICROMASTER 440 VFD 2.2kW – High-Response Vector Control for Demanding Applications

The Siemens MICROMASTER 440, model 6SE6440-2UC22-2BA1, delivers 2.2kW output power with 200-240V 1/3-phase input. This B-size unfiltered drive is designed for applications where standard V/f control falls short, offering advanced sensorless vector control that maintains precise torque delivery even during sudden load variations.

What distinguishes the MM440 from entry-level drives is its ability to handle applications requiring dynamic acceleration, controlled deceleration, and positioning accuracy. The built-in braking chopper allows rapid stops, while the integrated I/O—6 digital inputs, 2 analog inputs, 2 analog outputs, and 3 relay outputs—provides ample connectivity for complex automation tasks[reference:15].

The drive's BiCo (Binetor Connectivity) technology allows designers to reassign input and output functions freely, eliminating the need for external logic components in many applications. This flexibility is particularly valuable in retrofit projects where existing control system integration is required.

Key Specifications:
- Output Power: 2.2 kW (constant torque) / 3.0 HP
- Input Voltage: 200-240V AC 1/3-phase, +10/-10%, 47-63Hz
- Input Current: 14.1 A (constant torque)[reference:16]
- Rated Output Current: 10.4 A[reference:17]
- Output Frequency: 0-650 Hz
- Overload Capacity: 150% for 60 s, 200% for 3 s[reference:18]
- Protection Class: IP20
- Operating Temperature: -10°C to +50°C
- Dimensions (H×W×D): 202mm × 149mm × 172mm[reference:19]
- Weight: 3.3 kg[reference:20]
- Filter: Without built-in filter
- Frame Size: B

Typical Applications:
- Lifting and hoisting equipment with controlled lowering
- Automated storage and retrieval systems (ASRS)
- Conveyor systems requiring precise speed regulation under varying loads
- Centrifuges and decanters requiring controlled acceleration/deceleration
- Small to medium extruders and mixers
- Positioning systems for packaging and material handling

Key Features:
- Sensorless vector control delivers 100% torque down to 0 Hz without encoder feedback
- Built-in braking transistor enables rapid deceleration (external resistor required)
- Flying restart captures spinning motors without starting current surge
- DC injection braking for holding torque at standstill
- Integrated Modbus RTU interface for network communication
- 4 skip frequencies for mechanical resonance avoidance
- Adjustable PWM switching frequency from 2 kHz to 16 kHz
- Comprehensive protection: overvoltage, undervoltage, overload, short circuit, ground fault, motor stall prevention, motor lock, motor overtemperature, inverter overtemperature[reference:21]

B-Size Form Factor Advantages:
The B-size chassis (202×149×172mm) offers increased thermal dissipation capacity and expanded wiring space compared to the smaller A-size units. The terminal layout accommodates heavier gauge conductors for higher current handling, making installation and maintenance more straightforward for 2.2kW applications.

Important Notes:
- This product is discontinued (PM410). Available ONLY as a spare part[reference:22]
- Successor product reference available via SIOS ID 109746454[reference:23]
- A BOP or AOP is required for parameter configuration beyond factory defaults
- This model accepts both single-phase and three-phase input—verify your supply
- SINAMICS G120 series is the recommended replacement for new designs

FAQ:

Q1: What applications benefit most from MM440 vector control?
A: Applications with varying loads (mixers, extruders, centrifuges), applications requiring accurate positioning, and lifting/hoisting equipment all benefit significantly from the vector control's ability to maintain torque regardless of load conditions.

Q2: Can this drive control a crane or hoist?
A: Yes, with proper configuration and a correctly sized external braking resistor. The built-in braking chopper enables controlled lowering. However, for hoist applications, additional safety components (such as a mechanical brake contactor) are typically required per local safety codes.

Q3: What is the difference between 150% overload for 60s and 200% for 3s?
A: The 200% for 3 seconds allows the drive to handle very high starting surges (e.g., starting a high-inertia load from standstill). The 150% for 60 seconds is for sustained moderate overload conditions (e.g., temporarily higher processing demand).

Q4: Does this drive require an external EMC filter?
A: For industrial environments, the unfiltered version may be acceptable with proper shielding and installation practices. For CE compliance in residential or sensitive commercial environments, an external Class B EMC filter is required.

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