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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SunLee 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

Connector Type
Quick Connect
Current Rating
40 Amps
Mounting Type
Surface Mount
Brand
SUNLEE
Operation Mode
Automatic

⚡40 Amp Heavy Duty Current

🔩Universal Mounting Plate

🛡️UL Recognized Safety Certified

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S/.138

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In stock

Sold byAmazon PeruDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Upgrade your HVAC game with SunLee’s heavy-duty contactor — reliability you can feel!

PLUG PLAY READY - Universal mounting and quick-connect terminals make installation a breeze.
THERMAL TOUGHNESS - Class F coil insulation rated to 155°C for superior heat endurance.
SILVER STRONG CONTACTS - Premium silver alloy resists arcing and pitting for longer life.
TRUSTED SAFETY STANDARD - UL Recognized and A2L compliant for peace of mind in every install.
POWER PACKED PERFORMANCE - Handles 40A FLA & 50A resistive loads for robust HVAC reliability.

The SunLee 2 Pole 40 Amp 208/240VAC Definite Purpose Contactor is a heavy-duty HVAC replacement designed for 30A and 40A AC units, condensers, and heat pumps. Featuring silver alloy contacts and Class F coil insulation, it offers enhanced durability and thermal resistance. UL Recognized and A2L compliant, it ensures industry-standard safety. Its universal mounting plate and quick-connect terminals enable easy installation, making it a trusted choice for HVAC professionals and serious DIYers alike.

Specifications

ASIN	B0887TMXW8
Best Sellers Rank	#3,489 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Motor Contactors
Brand	SUNLEE
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 out of 5 stars 143 Reviews
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

Reviews

S**S

Excellent service and product

Excellent fast service. Product works fantastic

28.05.2026

S**N

Contactor

Fixed my problem

31.05.2026

E**N

Easy retrofit

Good price and retro fitted in air compressor easily

31.03.2026

C**O

Defective

Did not work. Thought it was going to fix my problem but ended up having to call a technician after it didnt do the trick... only for him to tell me the capacitor was bad. 500 bucks because it was defective.

21.05.2026

M**S

Part was delivered when promised

Works! I was able to get my well pump back up and running. Easy install

5.02.2026

B**R

Good value 220 volt relay

Well built relay at a good price. Easy hookup and seems solid and well built. Time will tell on durability but seems solid

11.02.2026

G**E

It came quickly and thank goodness since I was having so much problems with old rely.

I got this for my well as the old relay was sticking on. I had to drill new holes to mount it but it has been working for a day now and no problems.

22.12.2025

M**.

switch

good

2.10.2025

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