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6SE6420 Variable Frequency Drive Inverter For HVAC & Water Treatment
6SE6420 Variable Frequency Drive Inverter For HVAC & Water Treatment
Specifications
Model Number :
6SE6420
Place of Origin :
Germany
MOQ :
1
Price :
$44 - $1000
Payment Terms :
L/C,D/A,D/P,T/T,Western Union,MoneyGram
Delivery Time :
3-5Workday
Product name :
Frequency Converter Inverter
Level Of Protection :
IP20
Rated Power :
0.12kW - 15kW
Warranty :
Original Factory Warranty
Pakage :
Original Pakage
Shipping term :
International Express（DHL/FEDEX/TNT/UPS/ARAMEX）/ Sea Freight / Air Freight / International Special Line
Description

6SE6420 Frequency Converter Inverter Reliable Speed Control for HVAC & Water Treatment

6SE6420 Frequency Converter
The 6SE6420 series, part of MicroMaster 4 family, is an entry-level frequency converter designed for general speed control applications. With core advantages of compact design, easy operation, and high cost-effectiveness, it can be quickly put into use without complex commissioning. Ideally suited for industrial scenarios requiring moderate control precision and balancing reliability with cost, it supports the classic V/F control mode.
Key Advantages
  • High Cost-Effectiveness: Industrial-grade reliability at an entry-level price, significantly lowering the threshold for SMEs' automation transformation
  • Compact & Space-Saving: Ultra-small design, can be directly embedded in small control cabinets or equipment, saving installation space
  • Extremely Easy Operation: No professional technicians required—quickly set operating parameters via panel or terminals for high commissioning efficiency
  • Stable & Durable: Optimized for general industrial scenarios, multiple protection functions effectively resist power grid fluctuations and load impacts
  • Wide Adaptability: Supports single-phase/three-phase input, covering 0.12-15kW power range, perfectly matching fans, pumps, conveyors, and other common general equipment
Overseas Market Models
Input Voltage Input Type Power Model Remarks
200-240V 1-phase 0.12kW 6SE6420-2UC11-2AA1 No filter, IP20
0.25kW 6SE6420-2UC12-5AA1 No filter, suitable for small fans
0.55kW 6SE6420-2UC15-5AA1 No filter, cost-effective choice
1.1kW 6SE6420-2UC21-1BA1 No filter, compatible with small conveyors
2.2kW 6SE6420-2UC22-2BA1 No filter, universal 1-phase/3-phase input
200-240V 3-phase 0.37kW 6SE6420-2UC13-7AA1 No filter, industrial-grade stable operation
0.75kW 6SE6420-2UC17-5AA1 No filter, suitable for medium-small pumps
7.5kW 6SE6420-2UC27-5DA1 No filter, high-power 1-phase/3-phase input
380-480V 3-phase 0.37kW 6SE6420-2UD13-7AA1 No filter, mainstream model for European market
1.5kW 6SE6420-2UD21-5AA1 No filter, suitable for small compressors
5.5kW 6SE6420-2UD25-5CA1 No filter, high-frequency selection for general machinery
15kW 6SE6420-2UD31-5DA1 No filter, compatible with high-power general equipment
Core Specifications
Parameter Category Specific Parameter Details
Power Input Input Voltage 200-240V±10% (1-phase/3-phase); 380-480V±10% (3-phase)
Input Frequency 47-63Hz (compatible with global power grids)
Output Performance Output Frequency Range 0-650Hz (supports high-speed operation for precision equipment)
Output Power Range - 200-240V (1-phase): 0.12kW - 2.2kW
- 200-240V (3-phase): 0.12kW - 7.5kW
- 380-480V (3-phase): 0.37kW - 15kW
Frequency Resolution Digital setting: 0.01Hz; Analog setting: 10-bit precision (high control accuracy)
PWM Frequency Fixed at 4kHz (optimized for noise reduction and energy efficiency)
Control Mode Core Control V/F control (linear/quadratic characteristics selectable; ideal for general loads)
Protection Functions Key Protection Overcurrent, Overvoltage, Undervoltage, Overheating, Short-circuit, Motor Overload Protection (comprehensive electrical safety)
Physical & Environmental Protection Class IP20 (suitable for cabinet mounting; prevents finger contact with live parts)
Operating Temperature -10℃ ~ 50℃ (operating); -40℃ ~ 70℃ (storage) (adapts to harsh industrial environments)
Installation Method Wall-mounted (compact design, saves control cabinet space)
I/O Interface Digital Inputs 3 channels (programmable; PNP/NPN selectable)
Analog Inputs 1 channel (0-10V/0-20mA selectable; compatible with most sensors)
Relay Outputs 1 channel (30V DC/5A, 250V AC/2A; for alarm or control signal output)
Communication Standard Interface Integrated RS485 (supports USS protocol; enables remote monitoring)
Optional Expansion No additional communication modules required (cost-saving for basic automation)
Industry Applications
General Machinery Manufacturing
  • Small conveyors (food packaging line conveyors, e-commerce warehouse sorting belts)
  • Desktop packaging machines (plastic bag sealers, label applicators)
  • Small printing machines (business card printers, sticker printing equipment)
  • Woodworking machinery (mini table saws, sanders)
  • Small metalworking lathes (mini lathes, drill press speed control)
HVAC & Building Infrastructure
  • Ventilation fans for residential/commercial buildings (exhaust fans, fresh air system fans)
  • Small cooling towers (matching shopping malls/offices)
  • Air conditioning circulation pumps (hotel room HVAC water circulation)
  • Garage ventilation systems
Water Treatment & Environmental Equipment
  • Small water supply pumps (community secondary water supply, farm irrigation pumps)
  • Sewage treatment aeration pumps (rural/small industrial zone wastewater plants)
  • Dosing pumps (swimming pool disinfection, small wastewater treatment dosing systems)
  • Rainwater collection system pumps
Light Industry & Food Processing
  • Food processing lines (biscuit production conveyors, juice filling line speed control)
  • Textile machinery (small looms, yarn drafting machines)
  • Small air compressors (dental clinic/laboratory quiet compressors)
  • Auxiliary packaging equipment (vacuum sealers, shrink wrap machines)
Agriculture & Horticulture
  • Greenhouse ventilation fans
  • Irrigation pumps (orchard drip irrigation, vegetable garden sprinkler systems)
  • Feed mixers (small farm feed blending equipment)
  • Livestock farm ventilation/cooling fans
Small Business & Service Industry
  • Coffee shop grinders
  • Gym treadmill speed control
  • Dry cleaner garment conveyors
  • Small cold storage ventilation fans
  • Convenience store refrigerator condenser fans
Frequently Asked Questions
Purchase & Model Selection
Q1: I run a small bakery in the US (1-phase 220V power). Which model should I choose for my dough mixer (1.5kW)?
A1: Go with 6SE6420-2UC21-5BA1 (1.5kW, 200-240V 1-phase/3-phase). It works directly with your 220V single-phase power—no need for extra transformers. Many small US bakeries use this model for mixers and dough proofers; it's cheap and gets the job done without complicated settings.
Q2: Why are some models labeled "UC" and others "UD"? I'm confused about voltage compatibility for my European workshop (380V 3-phase).
A2: "UC" = 200-240V (for North America, Japan, etc.), "UD" = 380-480V (Europe, Middle East, etc.). For your 380V 3-phase setup, pick a "UD" model—like 6SE6420-2UD21-5AA1 (1.5kW) or 6SE6420-2UD25-5CA1 (5.5kW) if you need more power. Don't mix them up—plugging a "UC" model into 380V will burn it out instantly.
Installation & Wiring
Q4: I installed the inverter but it won't start—just flashes an error. I connected L, N to power and U, V, W to the motor. What's wrong?
A4: You forgot to set the motor parameters! Even basic models need this. Go to "quick commissioning" (P0010=1), enter your motor's rated voltage (e.g., 230V) and current (check the motor nameplate), then save and reset. Most first-time users skip this step.
Q5: The inverter gets hot and shuts down after 10 minutes. It's mounted in a small control cabinet—no other equipment inside.
A5: Ventilation issue! MM420 needs at least 10cm of space above and below for airflow. If your cabinet is too tight, drill ventilation holes or add a small 12V fan. Also, make sure the cooling vents on the inverter aren't blocked by wires.
Operation & Troubleshooting
Q8: The motor runs but is noisy and vibrates. It's a small conveyor for my boutique—1.1kW, 240V single-phase.
A8: Two fixes: First, check if the motor cables are tight (loose wires cause vibration). Second, change the V/F curve to linear (P1300=0) instead of quadratic. Quadratic is for fans/pumps—linear works better for constant-torque loads like conveyors.
Q9: The inverter trips with "F0002" (overvoltage) when I turn off the pump. Why?
A9: The pump is acting like a generator when it stops! For small pumps (under 2.2kW), lengthen the deceleration time (P1121) from 10s to 30s—gives the pump time to slow down without sending voltage back to the inverter.
Maintenance & Compatibility
Q12: I want to upgrade to a higher power model. Can I swap a 2.2kW inverter with a 5.5kW one without changing wiring?
A12: If the wiring is thick enough (at least 1.5mm² for 5.5kW), yes. The mounting holes are the same for small models (up to 7.5kW), so it'll fit in your existing cabinet. Just remember to redo the quick commissioning with the new motor's parameters.
Q13: Is this inverter compatible with solar power? I have a 240V off-grid solar system for my farm in Brazil.
A13: Yes, but you need a stable DC-to-AC inverter first (solar panels produce DC power). The MM420 works with most solar inverters as long as the output voltage is 200-240V±10% and frequency is 50/60Hz. Just make sure the solar system can handle the inverter's startup current (about 3x the rated current).
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6SE6420 Variable Frequency Drive Inverter For HVAC & Water Treatment

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Product Detail
Model Number :
6SE6420
Place of Origin :
Germany
MOQ :
1
Price :
$44 - $1000
Payment Terms :
L/C,D/A,D/P,T/T,Western Union,MoneyGram
Delivery Time :
3-5Workday
Contact Supplier
6SE6420 Variable Frequency Drive Inverter For HVAC & Water Treatment

Shanghai Fradwell Industrial Automation Co., Ltd.

Verified Supplier
1 Years
shanghai, shanghai
Business Type :
Manufacturer, Exporter
Main Products :
PLC Programmable Logic Controllers, HMI Touch Screen, PCB Control Board
Certification Level :
Verified Supplier
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