Soft starters are a practical part of motor controls. They solve a simple problem: when a motor goes from stopped to full speed instantly, it can strain the motor windings and the equipment around it. A soft starter gradually raises voltage so the motor accelerates more smoothly. But soft starters are not interchangeable. The real decision here is between a compact 220V single-phase unit for light-duty motors and a larger three-phase starter. This side-by-side puts the two options against each other so you can match the starter to your motor's phase, voltage, and price.
Quick Verdict
If you need a gentle start for a small single-phase motor, the 1/2/4/6/8KW single-phase soft starter is the straightforward pick. If you are working with a three-phase motor, the Kimatek ASAC-0/030/5/1 is the functional choice. Your motor's phase and size should drive the decision.
Side-by-side Comparison
| Detail | 220V Single-Phase Soft Starter | Kimatek 3-Phase 40HP Soft Starter |
|---|---|---|
| Price | USD 48.59 | USD 575.00 |
| Motor phase | Single-phase | Three-phase |
| Voltage support | AC 220V (110V-380V range) | 200-575V |
| Motor rating | B-1.5KW small motor configuration | 40HP @ 400V, 60A |
| Control extras | Adjustable start voltage and soft-start time via potentiometers | Aux contact included |
Where Each Product Wins
The single-phase unit wins when your motor is small and single-phase. It lets you tune both the starting voltage and how quickly the motor ramps up, so you can soften the start without a more complex control setup.
The Kimatek wins when you need three-phase capacity, and the included aux contact is a practical addition for control wiring. For a three-phase motor, this starter is the one rated for the job.
Product Notes
1/2/4/6/8KW Single-Phase Soft Starter (AC 220V)
This compact soft starter runs from a single-phase 220V supply and supports a 110V-380V input range. The start potentiometer and soft-start potentiometer let you set the starting voltage and the ramp time, with the soft-start duration adjustable up to 30 seconds. That tunable start is a concrete reason to choose it for a small motor that needs a gentler startup. The practical limitation is phase compatibility: this is a single-phase unit, so it will not drive a three-phase motor. The configuration offered here is the B-1.5KW version, so pair it with a small motor load. At USD 48.59, it is the lower-priced unit in this pair.
Kimatek 3-Phase 40HP Soft Starter (ASAC-0/030/5/1)
This is a three-phase soft starter rated at 40HP at 400V and 60A. It accepts a 200-575V input and handles 45-66Hz, and it is cULus listed and CE IEC 60947-4 compliant. It also supports DIN rail or chassis mounting and fits within a 4-inch by 8-inch by 7.375-inch envelope. The concrete reason to choose it is capacity: this is the model that can start a 40HP three-phase motor. The limitation is price: at USD 575.00, it is the higher-priced unit in this pair, so it makes sense only when your motor needs this level of three-phase starting capability.
Final Choice by Use Case
- Small single-phase motor in a light-duty application: choose the 220V single-phase soft starter.
- Three-phase motor: choose the Kimatek ASAC-0/030/5/1.
