Siemens MICROMASTER 440 VFD 0.55kW 200-240V 1/3-Phase 6SE6440-2UC15-5AA1

Siemens MICROMASTER 440 VFD 0.55kW – Mid-Range Vector Drive for Industrial Applications

The Siemens MICROMASTER 440, model 6SE6440-2UC15-5AA1, delivers 0.55kW output power with 200-240V 1/3-phase input. This unfiltered drive represents the highest power rating available in the A-size chassis within the MM440 series before transitioning to the larger B-size frame. Despite the compact 173mm height, this drive delivers robust vector control performance suitable for demanding small-scale industrial applications.

Key Specifications:
- Output Power: 0.55 kW (constant torque)
- Input Voltage: 200-240V AC 1/3-phase, +10/-10%, 47-63Hz
- Input Current: 6.2 A
- Rated Output Current: 3.0 A [11†L7]
- Output Frequency: 0-600 Hz [11†L7]
- Overload Capacity: 150% for 60s, 200% for 3s
- Protection Class: IP20 [11†L8]
- Operating Temperature: -10°C to +50°C [11†L8]
- Storage Temperature: -40°C to +70°C [11†L8]
- Dimensions (H×W×D): 173mm × 73mm × 149mm [11†L13]
- Weight: Approx. 1.3 kg
- Filter: Without built-in filter
- Frame Size: A

Typical Applications:
- Small industrial pumps (up to 0.75 HP)
- Industrial exhaust fans
- Small mixers and blenders
- Packaging machine main drives
- Small compressors
- Automated assembly line drives

Key Features:
- Sensorless vector control for low-speed torque
- Linear and Quadratic V/f control
- Built-in PID controller with sleep mode
- 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

Maximum Power in Compact Footprint:
The 0.55kW model represents the maximum power density in the MM440 A-size chassis. For applications requiring 0.75kW or higher, the B-size chassis provides increased thermal dissipation capacity. The A-size chassis of this model is only 73mm wide, allowing up to 8 drives per standard 600mm cabinet section.

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 configuration
- SINAMICS G120 series is the recommended successor for new installations

FAQ:

Q1: What is the maximum output frequency of this model?
A: The maximum output frequency is 600 Hz when using V/f control [11†L7]. For sensorless vector control, practical maximum frequency is typically 200-400 Hz depending on motor characteristics.

Q2: Can this drive be used for both single-phase and three-phase input?
A: Yes. This model accepts both single-phase and three-phase 200-240V input. Note that derating may apply for single-phase operation – verify with the specific application requirements.

Q3: What is the typical efficiency of this drive?
A: MM440 drives typically achieve 96-97% efficiency at rated load, contributing to energy savings compared to mechanical throttling methods for pump and fan applications.

Q4: How does sensorless vector control compare to V/f control?
A: Sensorless vector control provides superior low-speed torque (100% torque down to 0.5 Hz) and better dynamic response under varying loads. V/f control is simpler and sufficient for basic pump/fan applications where load is relatively constant.

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

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