Motor contactors do a simple job-use a low-voltage coil to switch a higher-power motor circuit-but the range of coil voltages and current ratings is wide. For residential HVAC, a 24VAC coil rated for 30-40A may be enough; for a plant floor, a medium-voltage contactor might operate at 5,000V and 360A. The four listings here cover that spread, from USD 13.92 to USD 1,350, so the first decision is matching the coil voltage and load to the right product.
Quick Take
- HIATSU Motor Contactor (USD 13.92): new two-pole contactor with 30A FLA, 120V coil, copper material, aimed at AC motor replacement.
- HVAC Motor Contactor 1 Pole 40A (USD 17.99): 24VAC coil, 40A full-load/50A resistive, UL-listed, single-pole.
- Fuji Electric SC-4-1 Lot of 2 (USD 17.10): two used 32A/10HP contactors with 220V coils, made in Japan.
- Westinghouse LF-50H430 (USD 1,350): used 360A, 5,000V AC contactor from the Cutler Hammer/Westinghouse platform.
Listed Prices at a Glance
| Product | Notable Specs | Listed Price | Price Bar |
|---|---|---|---|
| HIATSU Motor Contactor | 2-pole, 30A FLA, 120V coil, new | USD 13.92 | |
| HVAC 1-Pole 40A 24VAC Contactor | 1-pole, 40A full load, 24VAC coil, UL-listed | USD 17.99 | |
| Fuji Electric SC-4-1 Lot of 2 | 2 used units, 32A/10HP, 220V coil, Japan | USD 17.10 | |
| Westinghouse LF-50H430 | Used, 360A, 5,000V AC, Ampgard | USD 1,350.00 |
Decision Matrix
- Need a 24V control circuit for a heat pump or refrigeration compressor? The single-pole 40A contactor with a 24VAC coil is the only one in this set with that coil voltage.
- Need a 120V coil for a two-pole AC contactor? The HIATSU unit is a two-pole 30A contactor with a 120V coil, and it is the lowest-priced listing here.
- Need two 220V coil contactors with 32A/10HP ratings? The Fuji Electric lot of 2 gives you two units.
- Need a 5kV, 360A industrial contactor? The Westinghouse LF-50H430 is the only product in this group with that voltage/current capability.
Product Notes
HIATSU Motor Contactor - 2-Pole Air Conditioner Contactor 30A 120V - Motor Co
The HIATSU is a new two-pole contactor with a 30A FLA rating and a 120VAC coil. Its construction includes copper material and the listing mentions class B insulation, quick-connect terminals, and CE/RoHS certification, which makes it a straightforward candidate for air-conditioner motor replacement where the control voltage is 120V. The main limitation is the 30A current rating: it is not the right fit if the load draws more than 30A. With a single contactor included and a compact 3.46x2.95x2.24-inch package, it fits a specific HVAC slot rather than a wide range of industrial circuits.
HVAC Motor Contactor 1 Pole 40A 24VAC Coil for AC Heat Pump Refrigeration UL
This single-pole contactor is aimed at heat pumps and refrigeration. It is rated 40A full load and 50A resistive, with a 24VAC 50/60Hz coil, and the listing text notes UL listing. That combination makes it useful when a 24V control voltage and a 40A load are part of the system. The limitation is the one-pole design: it switches one line only, so it will not handle two-pole or three-pole switching jobs. The copper material and 0.24 kg weight point to a compact unit, and the 40A rating gives it more headroom than the 30A HIATSU contactor.
LOT of 2 Fuji Electric SC-4-1 Motor Contactor 32 Amp 10-HP SZ-CD1 220V Coil 32A
This Fuji Electric lot offers two SC-4-1 contactors with SZ-CD1 coils, each rated 32A and 10HP, with a 220V coil. The units are used, the listing describes them as in good working condition, and they were made in Japan. The immediate advantage is quantity: two contactors in one lot, which is something the single-unit listings do not offer. The limitation is the 220V coil and used condition; a 24V or 120V control circuit will not match this unit. Maximum amperage is listed as 40A, which gives a little headroom above the 32A current rating, but the coil voltage remains the key compatibility gate.
Westinghouse LF-50H430 360A 5000V AC Motor Contactor Ampgard 2121A13G01 5kV
This Westinghouse LF-50H430 is a used AC motor contactor rated 360A at 5,000V, part of the Cutler Hammer/Westinghouse Ampgard platform. It is in a different class from the residential HVAC units, with manufacture in the United States. The clear reason to choose it is a medium-voltage 5kV application where the other contactors would be unsuitable. The limitations are the used condition and the high price, which makes it a poor fit for a low-voltage circuit. If your system does not run at 5kV, this unit provides far more capability than needed, and the price reflects that heavy-duty role.
Final Recommendation by Use Case
- For a 24VAC heat pump or refrigeration circuit up to 40A, choose the HVAC Motor Contactor 1 Pole 40A 24VAC coil unit.
- For a 120V coil, two-pole AC replacement under 30A, the HIATSU unit is the lower-priced option.
- For two 220V coil contactors with 32A/10HP ratings, the Fuji Electric SC-4-1 two-pack is the only two-pack in this set.
- For a 5kV, 360A industrial line, the Westinghouse LF-50H430 is the only unit with that voltage/current rating.
