ABB UAC375AE103 3BHB006621R0103 Anti-Saturation Board

Description

ABB UAC375AE103 3BHB006621R0103 Anti-Saturation Board

Product Introduction

In an ABB high-power drive or excitation cabinet, an apparently simple control PCB can have a very specific job in the overall control architecture. The ABB UAC375AE103 3BHB006621R0103 is identified as a UA C375 AE103 anti-saturation board, rather than a conventional PLC I/O module or general-purpose processor. ABB catalog information reproduced in available records gives the formal description as “BOARD, ANTI-SATUR”, with product ID 3BHB006621R0103.

For maintenance procurement, the important distinction is that this is a system-specific spare board. Some secondary listings describe it as being used in high-power drive and excitation equipment, but their published electrical specifications conflict with one another. Therefore, the safest engineering approach is to match the complete UAC375AE103 / 3BHB006621R0103 designation, board revision, connectors, installed cabinet position, and host-system documentation rather than substituting specifications from another UAC or power-control board.

Key Technical Specifications

The 1.65 kg value, product ID, type designation, catalog description, spare-parts classification, and “BOARD, ANTI-SATUR” identification are supported by the available ABB catalog-derived record.

Application Scenarios & Engineering Considerations

High-Power Drive Systems

The UAC375AE103 is associated in available component records with ABB high-power drive equipment. It should be considered a dedicated control-system spare rather than an independently deployable automation module.

When replacing a board in an operating drive cabinet, the surrounding hardware matters just as much as the board number. Check the rack position, mating connectors, cable routing, board revision, and host control platform before installation.

UAC389AE02 HIEE300888R0002

Static Excitation Equipment

Secondary equipment records also associate the UAC375AE103 with excitation-control applications for large synchronous machines. This makes the board relevant to maintenance of generator excitation and other large power-conversion installations where magnetic saturation can affect the controlled electrical system.

The exact excitation-system architecture should be confirmed from the equipment drawings rather than inferred solely from the board designation.

Legacy Power-Control Cabinet Maintenance

This type of board is most relevant when an installed ABB control cabinet cannot simply be replaced as a complete system. Maintaining an exact spare can reduce the engineering work associated with changing the cabinet architecture.

For a maintenance purchase, record the UAC375AE103 designation and 3BHB006621R0103 order/product number together. A seller listing that shows only “UAC375” is not sufficient identification.

DCS and Plant Electrical-System Integration

The board should not be treated as a DCS communication module simply because some reseller descriptions call it a “control board.” Available evidence identifies its catalog function as an anti-saturation board. Any DCS interface belongs to the surrounding drive or excitation control architecture and should be traced through the system drawings.

Related Products

The following are related only at the equipment or ABB power-control level; they should not be treated as direct substitutes without engineering verification:

• ABB UAC375AE101 — reported as another UAC375-series variant; revision/configuration must be checked.
• ABB UAC375AE102 — another UAC375-series designation reported in secondary records; not confirmed as a drop-in replacement.
• ABB UAC375AE104 — reported as a related UAC375 variant; complete hardware and revision matching is required.
• ABB UAC385AE — appears in secondary listings as a related ABB control-board designation, but it should not be substituted for without documentation.
• ABB UFC760BE43 / 3BHE004573R0043 — another ABB power-control-related board designation appearing in the same spare-part ecosystem, but it is not established as a replacement for .

Engineer’s Guide: Field Pitfalls to Avoid

1. Do not classify it as a generic PLC control board

The formal catalog description is BOARD, ANTI-SATUR. Calling it a generic PLC module can lead procurement teams to compare it with completely different ABB control or I/O products.

2. Do not copy specifications between sellers

This part has a particularly important documentation problem. One secondary source describes it as a multifunctional controller with 24 VDC supply, CAN/RS-232, motion-control functions, and other parameters, while another describes it as an anti-saturation board with substantially different characteristics. Those descriptions cannot all be accepted as engineering-grade specifications.

For this reason, voltage, current, communications, temperature, and I/O data should be taken from the equipment manual or the physical board documentation.

3. Match the complete part number

Use both:

3BHB006621R0103

Do not accept “UAC375” alone as an adequate procurement description.

4. Inspect the board revision

Two boards with similar type designations can have different hardware revisions, component populations, or system compatibility. Photograph the complete board label before approving a replacement.

5. Verify the host equipment

Before installation, identify the exact ABB drive, excitation system, or power-control cabinet in which the board is installed. Check the cabinet drawings and board-location reference against the replacement.

6. Do not assume plug-and-play replacement

Even when the part number matches, commissioning may require configuration verification, wiring inspection, diagnostic checks, and functional testing. In a generator excitation or high-power drive application, the board should not be energized simply because its connector geometry appears identical.

FAQ

What is ABB ?

ABB , order/product number 3BHB006621R0103, is identified as a UA C375 AE103 anti-saturation board. ABB catalog-derived information gives its formal description as “BOARD, ANTI-SATUR.”

Is a PLC module?

No. The available identification supports treating it as a dedicated power-control/anti-saturation PCB rather than a conventional PLC CPU, digital I/O module, or DCS communication module.

What is 3BHB006621R0103?

3BHB006621R0103 is the ABB product/order identifier associated with . The two designations should be retained together on procurement documents.

Where is this board used?

Available secondary records associate the board with ABB high-power drive and excitation equipment. The exact host application should be confirmed from the installed cabinet documentation.

What voltage does require?

A definitive standalone operating-voltage specification could not be established from reliable documentation. Some reseller pages publish 24 VDC, while other descriptions identify substantially different functions. For engineering purposes, do not use those figures as a design basis without the applicable ABB equipment manual or board documentation.

Can UAC375AE101, AE102, or AE104 replace AE103?

Not automatically. These designations are reported as related UAC375 variants, but a different suffix can represent a different hardware revision or system configuration. Verify the ABB documentation, board revision, connectors, and host equipment before substitution.

What should be checked when purchasing a replacement?

At minimum, verify:

• designation
• 3BHB006621R0103 product number
• Board revision
• Physical label and connector arrangement
• Host ABB equipment model
• Cabinet/rack position
• Configuration or firmware requirements
• Actual condition and test evidence
• Packaging and signs of previous installation

For a legacy ABB power-control board, exact identification is more important than a long list of unverified electrical specifications.