Siemens MICROMASTER MM400 VFD 5.5kW 200-240V 3-Phase 6SE6420-2UC25-5CA1

Siemens MM400 VFD 5.5kW – Heavy-Duty Drive for High-Power Industrial Equipment

The Siemens MICROMASTER MM400, model 6SE6420-2UC25-5CA1, delivers 5.5kW output power with 200-240V 3-phase input. This is the highest power rating in the MM400 series, designed for heavy industrial equipment. Note that this model uses 200V input, unlike the 380V variants in the series.

Key Specifications:
- Output Power: 5.5kW (constant torque)
- Input Voltage: 200-240V AC 3-phase, 50/60Hz
- Rated Output Current: 22A
- Built-in Filter: Class A
- Protection Class: IP20
- Operating Temperature: 0°C to 50°C
- Dimensions: 245mm × 185mm × 195mm
- Weight: 5.5kg

Typical Applications:
- Large conveyors (width over 1 meter, length over 20 meters)
- Small air compressors (up to 7.5kW)
- Hydraulic system pump drives
- High-power industrial exhaust fans
- Crushers and shredders (light-start applications)

Why This Model?
The 5.5kW model is the only MM400 variant with 200-240V input, distinguishing it from all other 380-480V models. The larger chassis (245mm vs 173mm) provides superior heat dissipation. In continuous heavy-load operation (above 80% load), case temperature runs 8-10°C cooler than smaller models. One customer reported 6 months of continuous operation driving a 5.5kW mixer with temperature rise under 30°C.

Selection Guide:
This is the largest MM400 model and the only one with 200-240V input. Before purchasing, verify your facility has 200-240V 3-phase power. For 380-480V power, consider other MM400 models or add a step-down transformer.

FAQ:

Q1: Why is this 200V while other MM400 models are 380V?
A: The "UC" code in 6SE6420-2UC25-5CA1 indicates 200-240V input. MM400 models under 4kW are typically 380-480V, while some higher-power variants offer 200V input for specific regions or equipment requirements.

Q2: Can I run this on 380V power?
A: No. This drive accepts 200-240V input only. Connecting to 380V will cause immediate damage. If you have 380V power only, add a 380V-to-220V 3-phase transformer.

Q3: Can this 5.5kW drive run a 7.5kW motor?
A: Not recommended. The drive rating should equal or exceed motor rating. Using a 5.5kW drive for a 7.5kW motor will trigger overload protection and may damage the power module. Select a higher-power drive series.

Q4: What cooling clearance is required?
A: This 5.5kW model dissipates approximately 150W at full load. Allow 100mm clearance above and below the drive. Install cabinet ventilation fans if ambient temperature exceeds 40°C.

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