Overview
The ABB ACS350-03U-03A3-4 is a compact wall- or cabinet-mountable Micro Drive VFD designed for general machinery and industrial automation applications. This 1.1kW 3-phase unit operates from 380–480VAC input with 3.3A continuous output current, making it ideal for controlling AC induction motors in pump, fan, and conveyor systems. The ACS350-03U-03A3-4 belongs to ABB’s proven ACS350 series for 0.37–22 kW applications and features a built-in basic control panel with single-line numeric display and DIP switch configuration.
Key Features
- 1.1kW nominal power, 2.0 HP equivalent rating
- 3-phase 380–480VAC ±10% input voltage
- 3.3A continuous output current at 40°C / 50°C ambient
- R1 compact frame for space-constrained installations
- Built-in single-line numeric display and keypad
- Sensorless vector control and open-loop capability
- Integrated DC injection braking and dynamic braking transistor
- 5 digital inputs, 2 analog inputs, 1 relay output, 1 digital output, 1 analog output
- IP20 standard enclosure (EMC filter disconnected type code -03U-)
- CE, C-Tick, cUL, RoHS compliant
Technical Specifications
- Model: ACS350-03U-03A3-4
- Power Rating: 1.1 kW / 1.5 kW (2.0 HP equivalent)
- Frame Size: R1
- Input Voltage: 3-phase 380–480VAC ±10%
- Input Frequency: 48–63 Hz
- Output Current (I2N): 3.3A continuous at 40°C
- Output Frequency: 0–600 Hz
- Duty Cycle: 150% for 1 minute / 10 minutes continuous
- Enclosure Type: IP20, compact cabinet mounting
- Cooling System: Integrated fan (max ambient 40°C / 50°C with derating)
- Operating Temperature: −10°C to +50°C ambient
- Relative Humidity: 0–95% non-condensing
- Control Method: Sensorless vector, open-loop vector
- Protection Features: Overcurrent, overvoltage, thermal overload, short-circuit
- Braking: DC injection (Dynamic Braking Transistor included)
- Certifications: CE, C-Tick, cUL, GOST-R, RoHS
Typical Applications
- Centrifugal and displacement pumps (constant and variable flow)
- Fans and blowers in HVAC systems
- Conveyor and material handling systems
- Textile machinery and printing equipment
- Rubber and plastics processing equipment
- Woodworking machinery
- Food and beverage processing
- General machinery speed and torque control
Compatibility & Replacements
Compatible With
- ABB DriveWindow Light 2.x configuration software (offline and online parameter setup)
- 3-phase AC induction motors 0.37–22 kW range
- Wall or cabinet mounting hardware
- Standard 3-phase 380–480V industrial power distribution systems
- Motor temperature sensors (via I/O terminals)
- Remote control panels via shielded cable (max 3 m / 10 ft)
Replaces / Drop-In Replacement For
- Other ACS350-03U-03A3-4 units with identical ratings and frame
- Similar R1 frame 1.1–1.5 kW 3-phase VFDs from competing manufacturers requiring 380–480V input
Works With
- ABB Micro Drive Micro Drive standard application macros and control functions
- Hand/Auto switching, PID control, and torque control macros via parameter customization
- Analog output control for external device synchronization
- Relay and digital outputs for motor start/stop and status indication
- IP66/IP67 and UL Type 4X optional enclosure kits (order separately)
- Optional EMC filters for noise-sensitive installations (field-installable)
