When you need a contactor for a motor, air conditioner, or industrial switching job, the decision starts with matching your control circuit and load requirements to a unit that actually fits. The two options here sit at different points: one leans toward more current headroom, while the other is built as a control relay for tighter spaces. Your existing wiring and application will tell you which one belongs in your relays contactors industrial switches setup.
Quick verdict
The HIATSU is the higher-capacity option for jobs that need more switching headroom. The Modern Power is the choice when a smaller relay fits the job.
Comparison at a glance
| Product | Listed Price | Price Bar | Key Specs |
|---|---|---|---|
| HIATSU Motor Contactor 30A 120V | USD 13.68 | 2-pole, 30A, 120VAC coil, copper material | |
| Modern Power AC Contactor 18A AC110V | USD 16.91 | 18A, AC110V 50/60Hz, compact plastic body |
Where each product wins
- The HIATSU wins on current capacity and a 2-pole layout for dual-circuit control. Its copper material and 30A rating make it the stronger candidate for heavier motor loads.
- The Modern Power wins on installed footprint and control flexibility. The built-in auxiliary contacts and compatibility with momentary buttons suit a motor starter relay or main power switch on a smaller circuit.
Product notes
HIATSU 2-Pole Air Conditioner Contactor 30A 120V
The HIATSU is the higher-capacity unit in this pairing and is aimed at air conditioner and HVAC motor replacement. The package includes one contactor, and the unit carries an encapsulated coil, quick-connect terminals, class B insulation, and CE/RoHS certification. That combination gives you a contactor for a 120V coil application without needing extra parts. Quick-connect terminals make the wiring step more straightforward, and the encapsulated coil is a notable design detail. Its limitation is more practical than electrical: you get one contactor in the box, so if your project requires a backup or multiple contactors, you will need to order additional units. If you are replacing a single failed contactor in an HVAC system, this is the direct choice. For a lower-current control circuit, the other unit may line up better with the load.
Modern Power AC Contactor 18A AC110V
The Modern Power takes a more compact approach. It has a plastic body with a die-casting process, built-in auxiliary contacts, and compatibility with momentary buttons. The die-cast plastic construction is lightweight and impact-resistant, and the built-in auxiliary contacts work with momentary buttons for push-button control. That makes it well suited to motor starter relay duties or a main power switch for a 110V control setup. Choose it when you want a straightforward relay that can work with push-button control. The trade-off is capacity: the 18A working current is below the HIATSU's rating, so it is not the unit for a high-current HVAC motor. If the load is modest and the coil voltage matches your circuit, this is the contactor to pick.
Final choice by use case
Use the HIATSU at $13.68 for a single-contact replacement in an HVAC or air conditioner motor circuit. Use the Modern Power at $16.91 when a smaller relay is a better match for the setup.
