Choosing between a replacement control power supply board and a new industrial control transformer comes down to what your system is actually missing. The ABB APOW-11C Control Power Supply Board is designed for an ABB ACS800-104 inverter module. The Square D 9070TF100D1 Industrial Control Transformer is a control transformer for industrial power applications. With a $95 spread between the two, your decision should follow the part type your cabinet needs, not the price tag alone.
Quick verdict: If you need to restore an ABB ACS800-104 inverter module, the ABB APOW-11C is the direct replacement board. If you need an industrial control transformer for a control panel, the Square D 9070TF100D1 is the component that fits. They are different classes of industrial power equipment, so pick the one that matches the missing part.
| Product | Price | Condition | What it is |
|---|---|---|---|
| ABB APOW-11C Control Power Supply Board | USD 80.00 | Used | Control power supply board for ABB ACS800-104 inverter module, 3-phase |
| 9070TF100D1 Square D Industrial Control Transformer | USD 175.00 | New | Industrial control transformer |
Where the ABB board wins: If the component you are replacing is the APOW-11C inside an ACS800-104 drive, this board is the matching part. It is a 3-phase control power supply board and it is the lower-priced item in this face-off.
Where Square D wins: If you are shopping for an industrial control transformer rather than a drive board, the 9070TF100D1 is the product that fits. It is the industrial control transformer option with the model number 9070TF100D1, and it is the higher-priced item.
ABB APOW-11C Control Power Supply Board

The APOW-11C is a control power supply board made for an ABB ACS800-104 inverter module. It is a used board, but it has been tested and is fully functional, and it supports 3-phase operation. As the lower-priced product in this comparison, it gives you a direct replacement path when the APOW-11C is the board in your drive cabinet. The limitation is that it is not a general-purpose transformer. If the task is providing control power to a new panel rather than repairing an ACS800-104, this board will not substitute for a transformer. Because it is used, you are also relying on the functional test rather than a factory-new condition. Choose it when the drive module is your target.
9070TF100D1 Square D Industrial Control Transformer

The Square D 9070TF100D1 is a new industrial control transformer and carries the model number 9070TF100D1. It is classified as an Industrial Control Transformer, so it sits on the transformer side of the industrial power equation. If you need a new transformer for control circuits, this is the product that matches that need. The limitation is that it is not a control power supply board for an ABB ACS800-104 inverter module. As the higher-priced option, it makes sense when you need a new transformer rather than replacing a drive board. This is the product to choose when new transformer hardware is the requirement.
Final choice by use case
- Need to restore an ABB ACS800-104 inverter module: Choose the ABB APOW-11C Control Power Supply Board. It is the tested, fully functional replacement board at USD 80.00.
- Need an industrial control transformer: Choose the 9070TF100D1 Square D Industrial Control Transformer at USD 175.00.
- Need to decide on price alone: The $95 difference only matters if both parts could fit your application. In most setups, the product type and condition will settle the decision first.