Shopping for relays, contactors, and industrial switches starts with the circuit you're controlling: how much current does the load draw, and what coil voltage does your control wiring use? The HIATSU 2-Pole Air Conditioner Contactor at $13.80 and the Modern Power AC Contactor at $16.91 answer those questions differently. This head-to-head helps you decide which one matches your job.
Quick verdict
The HIATSU is the better fit when you're replacing a part in an HVAC system. The Modern Power is the better fit for a compact, general-purpose motor relay. The HIATSU is also the lower-priced unit.
At a glance
| Feature | HIATSU 2-Pole Air Conditioner Contactor | Modern Power AC Contactor |
| Listed price | USD 13.80 | USD 16.91 |
| Coil voltage | 120V | AC110V |
| Current rating | 30A | 18A |
| Build | Copper, class B insulation, encapsulated coil, quick-connect terminals | Plastic body with built-in auxiliary contacts |
| Best for | HVAC air conditioner motor replacement | Lighter motor starter and main power switch duties |
Where each product wins
The HIATSU wins when the load is an air conditioner motor and you want a contactor built for that specific duty. The Modern Power wins when space is tight and your control scheme uses momentary buttons. Its impact-resistant plastic body makes it easier to wire into a small panel.
Product notes
HIATSU Motor Contactor - 2-Pole Air Conditioner Contactor 30A 120V - Motor Co
This contactor is sold as a single unit, so a job covering multiple HVAC units requires ordering more than one. The class B insulation and encapsulated coil are the details that point to an HVAC-focused component, and the copper construction is a plus in a part that will switch frequently. It is the more specialized option here: a contactor meant for air conditioner motor duty rather than a general relay. If you only need to control a small motor, this unit has more capacity than the job requires. If the job is an air conditioner contactor replacement, that capacity is exactly the point.
Modern Power AC Contactor AC110V 50/60Hz Motor Starter Relay 18A Working Current
The built-in auxiliary contacts give this unit a clear advantage in control circuits that use momentary buttons. The compact, impact-resistant plastic housing is a practical fit for a crowded panel, and the lightweight body is easy to handle during installation. It is rated for AC110V 50/60Hz operation, which positions it for standard AC control applications. The limitation is the coil voltage: this unit targets a 110V control circuit, while the HIATSU targets 120V. If your control circuit needs a 120V coil, this is not the contactor to choose. For lighter motor-starter duty and main power switching, the Modern Power is the general-purpose, easy-to-install option.
Final choice by use case
- Choose the HIATSU for air conditioner motor replacement and heavier HVAC contactor duty.
- Choose the Modern Power for compact panels and lighter motor starter jobs.
- When the system you're repairing is an air conditioner, the HIATSU is the direct match. When you're wiring a new control panel for a lighter relay, the Modern Power is the more natural fit.
