Choosing between a 1-pole and 2-pole 40A contactor for your AC, heat pump, or refrigeration compressor comes down to how many circuits you need to switch. Both options run on 24V coils and carry a 40A full-load current, but they differ in pole count, listed price, and weight. The 2-pole model adds a second switching path, while the 1-pole model is lighter and listed at the lower price. Both are new condition, so the main decision is pole count rather than ampacity.
Quick Verdict
If your equipment already uses a single-pole contactor and you want the lower listed price, the 1-pole HVAC contactor is the straightforward buy. If you need a second switching path or want a definite-purpose contactor that consolidates two switching paths, the 2-pole Migro model is worth the extra $2.00.
Comparison at a Glance
| Product | Listed price | Price bar | Poles | Coil | Notable attributes |
|---|---|---|---|---|---|
| Dp Contactor 2 Pole 40 Amp 24V Coil HVAC 50A 40A 30A AC Motor Air Conditioner UL | USD 19.99 | 2 | 24 V | Definite-purpose; enclosed contacts; copper contact points; model 942024 | |
| HVAC Motor Contactor 1 Pole 40A 24VAC Coil for AC Heat Pump Refrigeration UL | USD 17.99 | 1 | 24VAC 50/60Hz | Copper construction; 40A FLA; 50A resistive load; 0.24 kg |
Where Each Contactor Wins
The 2-pole wins if you want two switching poles in one enclosure. With a second pole, it gives you more switching flexibility while keeping the same 24V coil and 40A rating. Its definite-purpose design targets heavy-duty replacement roles in HVAC equipment, and its fully enclosed contacts are part of the design.
The 1-pole wins if simplicity and a lower listed price matter most. It carries a 40A full-load amp rating and a 50A resistive load rating, and its single-pole layout keeps the footprint and the price tag down. The listed weight of 0.24 kg also makes it the lighter of the two.
Product Notes
Dp Contactor 2 Pole 40 Amp 24V Coil HVAC 50A 40A 30A AC Motor Air Conditioner UL
This 2-pole definite-purpose contactor carries a 40A rating and a 24V coil, with model number 942024 and a listed price of USD 19.99. It features fully enclosed contacts and copper contact points, and it is built as a heavy-duty replacement for 40A or 30A single-pole HVAC contactors. With a second pole, it gives you two switching paths in one unit, which can be useful if you need to switch two separate lines. The trade-off is the higher listed price compared to the 1-pole model, plus the fact that the compatibility focus is single-pole replacement. If your system already uses a single-pole contactor and you do not need the second pole, the extra $2.00 may not buy you anything functional.
HVAC Motor Contactor 1 Pole 40A 24VAC Coil for AC Heat Pump Refrigeration UL
This 1-pole contactor is listed at USD 17.99 and offers a 40A full-load amp rating with a 50A resistive load capacity. It uses copper construction and a 24VAC 50/60Hz coil, and it weighs just 0.24 kg, making it the lighter option. The single-pole design handles one switched line, which is a direct match for compressor or fan circuits that need only a single contact. The limitation is that it cannot switch two separate legs; if your equipment calls for a 2-pole contactor, the 1-pole will not do the job. At a lower listed price and lighter weight, it makes sense when the single pole is all you need.
Final Choice by Use Case
Choose the 2-pole contactor if you need two switching poles in one 40A, 24V-coil package. It gives you a second pole without moving to a different voltage or rating, and the added pole explains the higher listed price.
Choose the 1-pole contactor if you only need to switch a single line. It covers 40A full-load and 50A resistive loads with a lighter, simpler single-pole format at a lower listed price.
