How do I know if this is the right contactor for my equipment?

If your old contactor has a 240V Coil and is rated 40A, 30A, or 25A. This 40A model is a heavy-duty upgrade for lower amp units. Rule: Coil voltage must be exact; Amps can be higher, but never lower than your original one.

Can I use this on irrigation systems, deep well pumps, Industrial curing ovens, sauna heaters, gymnasium lighting?

It's designed for these "Line Voltage Control" applications. Because it features a 208/240V Coil, it matches the high-voltage power source used by this equipment, eliminating the need for a step-down transformer. Make sure coil voltage match.

Does this contactor support Auxiliary Contacts?

Yes. This model features standard mounting points on the side for adding auxiliary contact blocks (Snap-on type), check our SUNLEE Auxiliary switch.

I have a 24V thermostat. Will this work for my AC?

This contactor has a 240V Coil. Most residential thermostats output a 24V signal. If you connect a 24V thermostat to this 240V coil, it will not engage. Please purchase our model with a "24V Coil" for standard HVAC applications.

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

Sunlee 3 Pole 40 Amp Contactor 240v Coil Ul Recognized

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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Description

⚡ Elevate your HVAC game with industrial-grade power and precision!

RUGGED BUILD QUALITY - High-performance bulk molding compound base for enhanced durability
POWERHOUSE PERFORMANCE - Handles up to 40 Amps for heavy-duty HVAC demands
PRECISION VOLTAGE CONTROL - 240V coil ensures reliable and efficient switching
CERTIFIED SAFETY ASSURANCE - UL 508 & UL 60947-4-1 recognized for industrial-grade reliability
DURABLE CONTACT TECHNOLOGY - Silver Cadmium Oxide contacts for superior conductivity and longevity

The SUNLEE 3 Pole 40 Amp Contactor features a 240V coil with UL 508 and UL 60947-4-1 certifications, equipped with silver cadmium oxide contacts and a durable bulk molding compound base. Designed as a reliable OEM replacement for Siemens 42CF35AG, it delivers robust performance and safety for demanding HVAC control applications.

Specifications

ASIN	B0888DQ7X8
Batteries Required?	No
Best Sellers Rank	#7,456 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Motor Contactors
Customer Reviews	4.7 4.7 out of 5 stars (121)
Date First Available	May 7, 2020
Item Weight	1.08 pounds
Item model number	DRC-3XU04CG
Manufacturer	sunlee controls
Material	cadmium
Product Dimensions	3.94 x 2.56 x 3.35 inches
Size	3P 40A 208/240VAC

Reviews

G**P

Inexpensive replacement

Worked perfectly

7.06.2026

J**R

Works good

Good part

24.09.2025

K**R

Works perfectly

The shipping was perfect and product was exactly as described.👍

26.06.2026

C**A

Worked

Fit application good. Been going a few days now.

26.04.2026

A**R

Fixed the bad one

Did good

27.04.2026

F**E

Good.

Works well

22.06.2025

S**E

Work great

Excellent value replaced original perfectly.

14.10.2025

M**O

Excelente

12.01.2026

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NT$2439

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In stock

Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

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SUNLEE 3 Pole 40 Amp contactor 240V coil UL Recognized A2L Compliant OEM fits Siemens 42CF35AG equivalent DP Contactor HVAC Contactor

Description

Specifications

Reviews

Common Questions