ABB ACS550-01-03A3-4 Inverter Drive – 0.75kW/1.1kW, IP21

The ABB ACS550-01-03A3-4 inverter drive offers dependable control for motors up to 1.1 kW in small-scale industrial and commercial systems, delivering precision performance in a compact R1 frame.

With support for both VxF and sensorless vector control, integrated Modbus RTU, and user-friendly keypad access, this ABB VFD is ideal for small fans, pumps, and process equipment.

Technical Specifications

Model: ACS550-01-03A3-4
Series: ACS550
Type: Variable Frequency Drive (VFD)
Power Output: 0.75 kW (1 HP) at High Overload / 1.1 kW (1.5 HP) Fan & Pump Duty
Enclosure: IP21
Mounting: Cubicle Mount
Application: HVAC, compact pumps, laboratory systems, and light-duty automation

Electrical Specifications

• Input Voltage: 380–480 V AC (±10%)
• Phase: 3-phase
• Frequency Range: 50–60 Hz (±5%)
• Output Frequency: 0–500 Hz
• Output Current (HO / ND): 3.3 A
• Overload Capacity: 150% for 60 s (HO) / 110% for 60 s (ND)
• Control Type: VxF and Sensorless Vector Control
• Brake Chopper: External resistor required (120–641 Ω)
• Heat Dissipation: Max 40 W

I/O and Communication

• Digital Inputs: 6 programmable
• Analog Inputs: 2
• Analog Outputs: 2
• Relay Outputs: 3 contact sets
• Keypad: Assistant Control Panel (included)
• RS-485 / Modbus RTU: Built-in

Mechanical and Environmental

• Mounting Type: Cubicle-mounted
• Frame Size: R1
• Weight: 6.5 kg
• Dimensions: 369 × 125 × 212 mm (H × W × D, incl. gland kit)
• Cooling: Internal fan (ventilation: 200 mm above/below, 0 mm sides)
• Mounting Holes: 4 × 5.5 mm slotted holes (98 mm × 318 mm centres)
• Operating Temp: Up to +40 °C ambient

Compliance and Certifications

• CE Certified
• UL / cUL Listed
• EMC Compliance: IEC EN61800-3:2004 (C3/C2)
• RoHS Compliant
• Manufacturing Standards: ISO 9001, ISO 14001

Replacement Information

The ABB ACS550 series was succeeded by the ABB ACS580 in January 2018
Equivalent ACS580 models available with enhanced control and energy efficiency

Key Benefits of the ABB ACS550-01-03A3-4

✅ Compact Power: Reliable performance for motors up to 1.1 kW.

✅ Built-In Modbus RTU: Native communication without add-ons.

✅ Low Heat Output: Just 40 W of heat loss—ideal for tight enclosures.

✅ Slim Footprint: R1 frame fits neatly in compact panels.

✅ Proven ABB Build Quality: Trusted durability in industrial environments.

📦 In Stock Now at Drive Outlet Megastore

At Drive Outlet Megastore, we offer unbeatable prices on the ABB ACS550-01-03A3-4 inverter drive.

Perfect for compact automation needs, this drive delivers ABB reliability and versatile performance in a small but capable package.

Request a quote or contact us today

Trusted ABB Drives. Fast Delivery. Lowest UK Prices – Only at Drive Outlet Megastore.