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6SE6440-2UD35-5FB1

The 6SE6440-2UD35-5FB1 is a versatile 5.5kW (7.5HP) variable frequency drive from Siemens' MICROMASTER 440 series, designed for reliable speed control of three-phase asynchronous motors in industrial applications.

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General Information
Product Type: Variable Frequency Drive (VFD)

Model Number: 6SE6440-2UD35-5FB1

Series: MICROMASTER 440

Rated Power: 5.5 kW (7.5 HP)

Enclosure Rating: IP20 (for cabinet mounting)

Power Characteristics
Input Voltage:

3-phase 380V to 480V AC (±10%)

Frequency: 47-63 Hz

Output Voltage: 0 to input voltage (3-phase)

Output Current: 12.5 A (continuous)

Overload Capacity:

150% for 60 seconds

200% for 3 seconds

Control Features
Control Modes:

V/f control

Sensorless Vector Control (SVC)

Flux Current Control (FCC)

Switching Frequency: 2-16 kHz (adjustable)

Speed Control Range: 1:100 (sensorless vector mode)

Protection Functions
Electrical Protection:

Overcurrent/overvoltage

Motor overtemperature (PTC input)

Ground fault/short circuit

Thermal Protection:

Drive temperature monitoring

Automatic derating

Communication Interfaces
Standard I/O:

3 digital inputs

2 analog inputs (0-10V/0-20mA)

1 analog output (0/4-20mA)

1 relay output

Optional Fieldbus:

PROFIBUS DP (with optional module)

USS protocol (serial communication)

Physical Specifications
Dimensions (W×H×D): 150 × 245 × 195 mm

Weight: 3.5 kg

Cooling Method: Self-cooling (internal fan)

Mounting Options: Wall or DIN rail

Environmental Conditions
Operating Temperature: 0°C to +50°C (40°C at full load)

Storage Temperature: -40°C to +70°C

Humidity: <95% non-condensing

Altitude: ≤1000 m (derating above)

Certifications & Standards
Safety: EN 61800-5-1

EMC: EN 61800-3

Approvals: CE, UL, cUL

Typical Applications
✔ Pump and fan control
✔ Conveyor systems
✔ Mixing applications
✔ General-purpose machinery