
The ABB ACS355-03U-31A0-4 is a three-phase AC machinery drive designed for controlling asynchronous AC induction motors and permanent magnet synchronous motors in industrial automation applications. This compact, wall-mountable or cabinet-mountable drive operates on 380-480 VAC three-phase input and delivers 20 hp (15 kW) rated motor power with 31 A continuous RMS current output. The drive features sensorless vector control for precise speed and torque regulation, built-in braking chopper for enhanced deceleration control, and integrated Safe Torque Off (STO) function meeting SIL 3 safety standards. Engineered for the OEM machine-building sector, the ACS355 offers rapid commissioning through application macros and panel assistants, making it ideal for food and beverage, material handling, lifting, textile, printing, rubber and plastics, and woodworking machinery. The IP20 open enclosure design with frame size R4 provides compact dimensions for space-constrained installations.
Item Details
- Brand Name: ABB
- Manufacturer: ABB
- Item Type Name: Variable Frequency Drive (VFD)
- Product Family / Series: ACS355
- Manufacturer Part Number: 3AUA0000058223
- Series: ACS355 Machinery Drives
Product Specifications
- rated_input_voltage: 380-480 VAC
- input_phase: 3-phase
- output_phase: 3-phase
- continuous_output_current: 31 A
- rated_motor_power_kw: 15 kW at 400 V
- rated_motor_power_hp: 20 hp at 460 V
- overload_capacity: 150% (50% overload allowed)
- frequency_range: 48-63 Hz
- control_method: Sensorless vector control
- motor_control_frequency: Up to 599 Hz
- enclosure_rating: IP20
- frame_size: R4
- mounting_type: Wall or cabinet mounting
- built_in_features: Braking chopper, Safe Torque Off (STO) SIL3
Additional Details
- Ambient Temperature Range: -10 to 40 °C (14 to 104 °F), up to 50 °C (122 °F) with 10% derating
- Relative Humidity: Less than 95% without condensation
- Altitude Rating: 0 to 1000 m full rating, 1% derating per 100 m from 1000-2000 m
- Contamination Levels: Class 3C2 chemical gases, Class 3S2 solid particles (operation)
- Communication Options: Optional fieldbus adapters for PROFIBUS DP, CANopen, Modbus RTU, Ethernet IP
- Display: LCD display with control buttons
- Color: RAL 9002
Measurements
- Height: 260 mm (10.24 in)
- Width: 169 mm (6.65 in)
- Depth: 244 mm (9.61 in)
All PLC Direct products come with a 1-year warranty. The warranty is issued by PLC Direct. Warranty coverage commences at the date of purchase. The warranty is for mechanical defects or failures not caused by human factors including but not limited to (a) incorrect installation, (b) operating the unit in sub-optimal conditions or in scenarios not recommended by the manufacturer, (c) poor unit maintenance, etc. The warranty does not cover programming or software related issues.
If the product is eligible for PLC Direct’s warranty coverage and the customer encounters an issue with the product, we will request the item is shipped to us for diagnosis and examination. Regardless of the cause of product issues, the customer will bear responsibility for the cost of shipping the unit to PLC Direct for evaluation. Where the unit was damaged by human factors, we will offer a repair or replace quote; in cases where damage was caused by human factors, the customer is responsible for the cost of shipping the repaired/replaced unit from PLC Direct to the customer. Where the unit was not damaged by human factors but is covered by PLC Direct’s warranty, we will repair or replace the unit at our cost (or, in rare cases, refund you your purchase); in such cases, PLC Direct will bear the cost of shipping the repaired or replaced product back to the customer. It is up to PLC Direct’s discretion whether to repair, replace, or refund the customer in such cases. Diagnoses can take time to complete based on technician availability and the complexity of diagnosis.
In no event shall PLC Direct be liable for any damages except actual damages up to, but not exceeding, the amount paid to us for the product, including we shall not be liable for any consequential or indirect damages or lost profits whether or not advised of same.
PLC Direct offers free shipping worldwide. Product ship from a various warehouses worldwide based on the customer's and the product's location. The estimated delivery date on the product page is PLC Direct's best estimated assuming a US-based shipping destination.
Regardless of where the product is shipping from, PLC Direct covers all duties for US-based shipping destinations. For non-US-based shipping destinations, customers are responsible for duties as appropriate.
PLC Direct's focus is on balancing price with lead time. Some but not all products can be expedited. If you have questions about delivery ETAs, please contact our team.

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