ABB SA168 (3BSE003389R1) Power Supply Unit

Overview

The SA168 module (part number 3BSE003389R1) from ABB is a high-capacity industrial power supply designed primarily for the ABB Advant OCS and related control platforms. It converts mains AC into a stable 24 V DC output and is built specifically for demanding automation systems where reliability, continuity and robust power delivery are key. 

Technical Specifications

Here are the main parameters of the SA168:

• Input: AC 230 V (mains) 

• Output: DC 24 V nominal at up to 25 A

• Dimensions (approx): Depth 255 mm, Height 177 mm, Width 482 mm

• Weight: about 26.6 kg

• Compliance: Note that this part is exempt from the 2011/65/EU (RoHS) directive under certain conditions.
  

Key Features

• Large output capacity (24 V/25 A) suitable for heavy I/O or controller racks

• Designed for integration with ABB’s Advant OCS automation systems

• Robust industrial design: built for control cabinet use in automation plants

• Includes protection and monitoring to support safe operation in industrial environments

• The physical size and power level reflect that it’s a major subsystem component rather than a small plug-in card

Structure & Composition

Internally, the SA168 comprises:

• A mains AC input stage converting 230 V AC to an internal DC bus

• A high-capacity DC output regulation stage delivering 24 V DC to downstream modules

• Protective devices (fuses, overvoltage protection, likely thermal protection)

• Mounting hardware suitable for a control rack or cabinet panel with sufficient cooling and ventilation

• Terminal blocks for input and output connections (mains and 24 V DC output)
  It is designed as a full-sized module rather than a compact desktop supply, reflecting its role in large system installations.

Application Fields

Ideal applications include:

• Large DCS/PLC systems (especially ABB Advant OCS) requiring a stable 24 V rail for control and I/O modules

• Process automation plants, chemical/petrochemical, power generation where reliable control power is vital

• Control cabinets where high current 24 V DC provision is needed for I/O modules, sensors, actuators tied to the control system

• Retrofit or replacement power supply in an ABB control system rack where this part is specified
  

Installation & Maintenance

Installation tips:

• Ensure appropriate ventilation and cooling around the module (due to its size/weight and power rating)

• Mount securely according to ABB rack specifications

• Connect the AC mains (230 V) input properly and earth/ground per ABB safety guidelines

• Connect the 24 V output to the distribution bus or I/O modules, making sure proper fuse or protective devices are in place

Maintenance suggestions:

• Periodically check the 24 V output voltage under load to ensure it remains within tolerance

• Monitor for abnormal temperature rise, dust build-up, or degradation of cooling

• Inspect wiring and terminal connections for looseness or corrosion

• If the module shows signs of failure or instability, replacing with a genuine 3BSE003389R1 is recommended to maintain system integrity

Additional Information

This power supply unit is a critical component in ABB control architectures, offering a high-capacity, reliable 24 V DC rail that supports many downstream modules. Because of its size, weight and output capability, it is treated as part of the “core” power infrastructure rather than a peripheral card. Genuine units carry the correct part number and meet ABB’s specification—generic or aftermarket replacements may not meet performance needs.