ABB SA168 3BSE003389R1 Power Supply Unit

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

ABB SA168 3BSE003389R1 is an industrial power supply unit that converts 230 V AC input to 24 V DC control power for automation equipment. ABB’s product page identifies it as SA168 Power Supply Unit, with 24 V DC output at 25 A and a specified spare fuse reference.

From a supply-chain angle, this is a smart New Surplus spare for legacy control cabinets where a PSU failure can stop an entire panel. Holding one or two units on-site lowers stock-out risk, while avoiding overbuying makes sense because power supplies are easier to consolidate across sites than hard-to-source CPUs or relays.

SA168 3BSE003389R1

SA168 3BSE003389R1

Installation & Configuration Guide

Stage 1: Pre-Installation

Lock out and tag out the panel before any work begins. Use an ESD strap, insulated tools, and a camera to document wiring, terminal numbers, fuse details, and mounting orientation. Verify input voltage, output load, and cabinet ventilation before replacement.

Stage 2: Removal

Disconnect the AC input and DC output in the order specified by your site procedure. Remove the unit evenly and support adjacent wiring so you do not stress terminal blocks. Check for heat damage, loose lugs, or discoloration before installing the replacement.

Stage 3: Installation

Install the new unit with the same mounting position and wiring layout as the original. Confirm the output polarity, ground connection, and fuse rating match the old installation. Tighten terminals to spec and verify any redundant feed or parallel supply arrangement before energizing.

Stage 4: Power-On & Testing

Restore input power and measure the DC output before reconnecting the full load. Check for abnormal ripple, overload alarms, or fan/indicator issues if applicable. Bring the load online in stages so you can confirm the 24 V bus remains stable.

Firmware/Software Versions & Upgrade Notes

This is a power supply unit, so firmware concerns are generally lower than for CPUs or relays. The main compatibility issue is not software; it is matching the correct voltage, current rating, fuse type, and cabinet footprint to the original installation.

If your cabinet includes monitoring or supervisory logic tied to this PSU, document the replacement date and load current before and after the swap. Do not substitute a lower-current unit just because it fits mechanically.

Frequently Asked Questions

Is this really new?
Yes, the correct procurement position is New Surplus / Original New, not refurbished. That means traceable OEM inventory, intact packaging, and QC verification before shipment.

Why is it cheaper than OEM new but higher than refurb?
New Surplus usually comes from excess OEM inventory or controlled release stock. It prices below OEM list, but above lower-traceability inventory because it carries better risk control.

Treat it as lifecycle-sensitive if your cabinet is tied to a legacy ABB platform. For installed-base support, it is worth stocking strategically.

Can I hot-swap it?
Only if your cabinet architecture and site procedure explicitly allow it. For most power supplies, plan a controlled outage so you do not disturb the 24 V distribution bus.

Will my settings stay intact?
There are no application settings inside a standard PSU like there are in a CPU or relay. The key is preserving wiring, fusing, and load distribution.

What warranty should I expect?
Warranty terms depend on the supplier and QC package. For New Surplus power hardware, ask for serial traceability, test records, and a written warranty period tied to shipment.