Soft starters smooth out the moment a motor turns on, limiting current surge and mechanical stress instead of letting the motor slam to full speed. In the world of soft starters and motor controls, you can find everything from a small module for shop equipment to an industrial autotransformer for a production line. The two units here sit at opposite ends of that range, so the purchase decision comes down to the motor you're actually running.
Quick verdict: If your motor is a single-phase unit in the lower kilowatt range, the LVSEDTAL module is the straightforward, easy-to-install choice. If you're starting a large industrial motor, the Square D Size 5 is the heavy-duty option.
| LVSEDTAL Soft Starter Module | Square D Size 5 Autotransformer | |
|---|---|---|
| Listed price | USD 67.67 | USD 4,750.00 |
| Price bar | ||
| Condition | New | Used |
| Motor capacity | 220V single phase | 2KW/4KW/6KW/8KW | 200 HP | 250A |
| Control type | Soft starter module | Reduced voltage autotransformer |
| Origin | China | United States |
Where each product wins
The LVSEDTAL module wins on upfront cost, simplicity, and fitting small machines. It's a new, lightweight unit with no assembly required, and its soft-start function is aimed at reducing current impact and mechanical stress during startup.
The Square D Size 5 wins on capacity and industrial build. It is made in the United States and designed for large motor loads.
LVSEDTAL Soft Starter Module
The LVSEDTAL module is the low-cost answer for smaller 220V equipment. With support for 2KW, 4KW, 6KW, and 8KW motors, it covers a range of compact machines. It provides smooth start and stop behavior that reduces current impact and mechanical stress during startup, extends motor lifespan, and improves system reliability. Protection measures are built in to help prevent motor damage. Assembly requires no additional effort, and at 12.3 ounces it's easy to handle. The clear limitation is capacity: this is a module controller for modest motors, not a replacement for an industrial starter. If your motor fits in that 2-8KW range and runs on 220V, this is a practical way to add soft-start behavior without a heavy investment.
Square D Size 5 Autotransformer
The Square D Size 5 is built for serious motor control. It is rated for 200 HP and 250A, and the reduced-voltage autotransformer design is built to soften the starting current of a big motor. This is a used industrial unit made in the United States, and only the items pictured are included. The biggest consideration is the USD 4,750 price, which puts it in a different investment class than the module. The used condition also means the buyer is relying on the condition shown. If your motor is in the 200 HP class and needs a 250A starter, this Square D is the appropriate piece of equipment. For a smaller machine, it would be far more starter than the job requires.
Final choice by use case
Match the starter to your motor's voltage, phase, and horsepower. For a compact machine that needs gentle starts, the LVSEDTAL module delivers a simple, low-cost soft start. For a large industrial motor, the Square D Size 5 autotransformer has the capacity to handle the job. Choosing the wrong scale costs more in the long run, so the price gap matters less than the motor it will control.
