Choosing between two 2-pole contactors usually comes down to coil voltage and current rating. Both are AC contactors, but each one is aimed at a different control circuit and load size. The coil voltage and ampacity are what separate them. Your existing coil supply will often settle the question before anything else.
Quick verdict
Pick the 2 Pole 30 Amp 24 VAC Coil AC Contactor when you need a direct-replacement-style contactor for a compressor or condenser application. Pick the AC Contactor 40 Amp 50 RES 2 Pole 110/120VAC Coil when you need a definite-purpose contactor rated for heavier switching.
Listed prices and specs at a glance
| Product | Coil | Current rating | Listed price | Price bar |
|---|---|---|---|---|
| 2 Pole 30 Amp 24 VAC Coil AC Contactor | 24 VAC | 30A FLA | USD 24.99 | |
| AC Contactor 40 Amp 50 RES 2 Pole 110/120VAC Coil | 110/120 VAC | 40A inductive / 50A resistive | USD 22.99 |
Where each product wins
- 2 Pole 30 Amp 24 VAC Coil AC Contactor: the better fit when your control circuit and load match its coil voltage and current rating.
- AC Contactor 40 Amp 50 RES 2 Pole 110/120VAC Coil: the better fit when you need the higher capacity and the line-voltage coil.
Product notes
2 Pole 30 Amp 24 VAC Coil AC Contactor
This contactor is positioned as a replacement for air-conditioner compressor and condenser units. It uses a 24 VAC coil and is rated 30A FLA, with a 50/60 Hz frequency range and a maximum withstand voltage of 600 VAC. Copper terminal contacts and a pure copper coil are used, with a flame-retardant shell. The operating temperature range is -40°C to +65°C. If your control transformer supplies 24 VAC and the motor load is at or below 30A, this is the direct replacement fit. The trade-off is current headroom: it is not the contactor to pick if you need to switch more than 30A FLA.
AC Contactor 40 Amp 50 RES 2 Pole 110/120VAC Coil
This definite-purpose contactor is built for heavier loads. It is rated 40A for inductive/motor loads and 50A for resistive loads such as incandescent lamps, resistance furnaces, or electric heaters. The coil is 110/120 VAC, and UL Listed appears in the product name. Shopcorp is the named brand. AC-1 and AC-3 application categories cover HVAC, refrigeration, lighting, and heat pump use. The limitation is the coil supply: if your control circuit only provides 24 VAC, the 110/120 VAC coil is not the right match. For a 40A motor load or a 50A resistive load, though, it offers the higher capacity.
Final choice by use case
- Need low-voltage coil control? Go with the 2 Pole 30 Amp 24 VAC Coil AC Contactor.
- Need a 110/120 VAC coil and more headroom? Go with the AC Contactor 40 Amp 50 RES 2 Pole 110/120VAC Coil.
The 40A definite-purpose contactor lists at USD 22.99 while the 30A model lists at USD 24.99. Coil voltage and load matching matter more than that USD 2.00 difference.
