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

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

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

⚡40 Amp heavy-duty current

🔧Universal mounting & quick connect

🛡️UL Recognized safety certified

A$39

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Upgrade your HVAC game with the contactor pros trust!

SAFETY FIRST - UL Recognized and A2L compliant, rigorously tested to meet strict US safety standards.
BUILT TO LAST - Silver contacts resist arcing and pitting, ensuring longevity under heavy use.
PLUG PLAY READY - Universal mounting plate with standard lug terminals and spade connectors for fast, hassle-free installation.
BROAD COMPATIBILITY - Fits most major residential AC brands including Carrier, Bryant, Goodman, Lennox, Rheem, and Trane.
POWERHOUSE PERFORMANCE - Handles up to 40A FLA and 50A resistive load for reliable HVAC operation.

The SunLee 2 Pole 40 Amp 208/240Vac Coil Contactor is a heavy-duty, UL Recognized HVAC replacement designed for 30A and 40A AC units, condensers, and heat pumps. Featuring silver contacts and Class F coil insulation, it offers superior durability and thermal performance. Its universal mounting and quick-connect terminals ensure easy installation, while compatibility with top residential AC brands makes it the go-to choice for technicians and DIYers seeking reliable, long-lasting HVAC control.

Specifications

ASIN	B0887TMXW8
Best Sellers Rank	#5,944 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Motor Contactors
Brand	SUNLEE
Brand Name	SUNLEE
Coil Voltage	240 volts_of_alternating_current
Connector Type	Quick Connect
Contact Current Rating	40 A
Contact Material	Silver
Current Rating	40 A
Customer Reviews	4.3 out of 5 stars 178 Reviews
Manufacturer	sunlee controls
Minimum Switching Voltage	240 volts
Mounting Type	Surface Mount
Number of Items	1
Number of Packs	1
Operation Mode	Automatic
Specification Met	UL
Unit Count	1 Count
Wattage	336 watts

Reviews

A**A

Great product

Works perfect for outside lights 240 volt.

27.06.2026

H**G

Quick shipping

Part woks like it suppoded too and great price

3.10.2026

P**S

Everything it says it is…

Just what it says it was .

22.08.2026

A**R

Junk

Complete garbage could not pick 0 star. Does not work

28.09.2026

T**R

electrical replacment for C240C but physically a bit taller

works like the original C240C that blew out from water damage (don't let your EV charger sit in the rain). used to replace the relay in openevse charger. feet/screw mount fits perfectly. however, it's about 5mm taller so the lid on the charger does not close fully. working for now but i'll replace it with an original later. 4 stars for functionality. minus 1 for height.

21.11.2024

J**H

Don’t be dumb make sure you read

I didn’t mean to get a 240v coil so that’s my fault but the product looks good

24.07.2026

P**C

Air compressor motor starter

Perfect size

22.07.2026

S**S

Excellent service and product

Excellent fast service. Product works fantastic

28.05.2026

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TrustScore 4.5 | 7,300+ reviews

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