Siemens MICROMASTER MM400 VFD 3.0kW 380-480V 3-Phase 6SE6420-2UD23-0BA1

Siemens MM400 VFD 3.0kW – High Torque for Demanding Applications

The Siemens MICROMASTER MM400, model 6SE6420-2UD23-0BA1, delivers 3.0kW output power. This model provides significantly higher starting torque than lower-power variants while maintaining the same large chassis design as the 2.2kW model.

Key Specifications:
- Output Power: 3.0kW (constant torque)
- Input Voltage: 380-480V AC 3-phase, 50/60Hz
- Rated Output Current: 7.2A
- Built-in Filter: Class B (enhanced filtering)
- Braking Transistor: Built-in
- Protection Class: IP20
- Operating Temperature: 0°C to 50°C
- Dimensions: 245mm × 185mm × 195mm
- Weight: 3.3kg

Typical Applications:
- Heavy industrial conveyors
- Large centrifugal pumps (10-20 HP)
- Industrial fans (large diameter)
- Mixers and agitators
- Small extruders

Why This Model?
The 3.0kW model offers the highest power in the MM400 series before stepping to the next frame size. In a recent waste treatment facility upgrade, this drive reduced pump energy consumption by 28% while maintaining constant discharge pressure. The built-in PID controller eliminated the need for external control hardware.

Selection Guide:
Select 3.0kW when your motor is rated 2.2kW-3.0kW and you need the enhanced features of the "BA1" suffix. For motors above 3.0kW, consider the 4.0kW or 5.5kW models (note voltage differences).

FAQ:

Q1: What is the maximum output frequency?
A: 0-650Hz programmable. For standard induction motors, practical maximum is typically 87Hz (150% base speed) or 120Hz (200% base speed) with motor manufacturer approval.

Q2: Does this include a keypad?
A: A basic keypad is included for parameter setting and local control. An optional remote keypad (6SE6400-0BP00-0AA0) with longer cable is available for door mounting.

Q3: What ambient temperature range is supported?
A: Operating -10°C to 50°C at rated current. Storage -40°C to 70°C. Below 0°C, allow longer warm-up time before applying full load.

Q4: Can I parallel multiple motors with one drive?
A: Yes, provided total motor current does not exceed drive rating. Each motor should have its own thermal overload protection. Total cable length between drive and motors should not exceed specified limits.

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