Can this 40A contactor replace a 30A contactor?

Yes. This 40A contactor is a safe upgrade for a 30A unit, provided the Coil Voltage (240V) and Poles match. Rule: Coil voltage must be exact; Amps can be higher, but never lower than your original one.

How do I choose between a 24V and 240V Coil?

Check your control source. Thermostats usually use 24V. Timers or Pressure Switches (like on water heaters/pumps) usually use 240V. Always match your old part label.

Can I use this 40A contactor on my 4500W/5500W Electric Water Heater?

Most water heaters (4500W/5500W) come with 30A contactors. Upgrading to this 40A model provides thicker silver contacts and better heat resistance, which can extend the lifespan of your unit and prevent contact welding.

Is this suitable for a Well Pump Control Box, Pool/Spa Heater or EV Charger

Yes. It is rated for 40 Amps, making it heavy-duty enough to handle the high startup current (inrush) of pump motors. Just ensure your control switch (float switch or timer) provides a 240V signal.

My old contactor buzzes/hums — will replacing it fix that?

Often yes. Buzzing can be caused by a worn coil/armature, pitted contacts, or low control voltage. Replacing the contactor commonly resolves noise if the control voltage is stable and wiring is correct

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2 Pole 40 Amp 208/240Vac Coil UL Recognized A2L Compliant Definite Purpose Contactor Heavy Duty HVAC Replacement for 30A & 40A AC Units, Condensers, Heat Pumps Equivalent to 45GG20AG C240C

Product ID: 227077892

Details

Brand
SUNLEE
Connector Type
Quick Connect
Contact Material
Silver
Current Rating
40 Amps
Mounting Type
Surface Mount

⚡40 Amp heavy-duty current

🔧Universal mounting & quick connect

🛡️UL Certified safety standard

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Description

⚡ Upgrade your HVAC game with power and precision!

BUILT TO LAST - Silver contacts resist arcing and Class F coil insulation withstands up to 155°C heat stress.
PLUG PLAY READY - Universal mounting plate with standard lug terminals ensures fast, hassle-free installation.
BROAD COMPATIBILITY - Fits top HVAC brands like Carrier, Goodman, Lennox, and more—upgrade without compromise.
SAFETY YOU CAN TRUST - UL Recognized and A2L compliant for peace of mind in every connection.
POWER PACKED PERFORMANCE - Handles 40 Amps FLA & 50 Amps resistive load for robust HVAC reliability.

The SunLee 2 Pole 40 Amp 208/240Vac Definite Purpose Contactor is a heavy-duty, UL recognized HVAC replacement designed for 30A and 40A AC units. Featuring silver contacts and Class F coil insulation, it offers superior durability and thermal resistance. Its universal mounting and quick-connect terminals make installation seamless, while compatibility with major HVAC brands ensures a versatile, technician-ready upgrade.

Specifications

ASIN	B0887TMXW8
Best Sellers Rank	#4,000 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Motor Contactors
Brand Name	SUNLEE
Coil Voltage	240 Volts (AC)
Connector Type	Quick Connect
Contact Current Rating	40 Amps
Contact Material	Silver
Current Rating	40 Amps
Customer Reviews	4.4 4.4 out of 5 stars (147)
Manufacturer	sunlee controls
Minimum Switching Voltage	240 Volts
Mounting Type	Surface Mount
Operation Mode	Automatic
Specification Met	UL
Unit Count	1.0 Count
Wattage	336 watts

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A$41

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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TrustScore 4.5 | 7,300+ reviews

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