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

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Description

⚙️ Elevate your HVAC game with industrial-grade reliability and certified safety!

RUGGED BUILD QUALITY - High-performance bulk molding compound base resists wear and environmental stress
POWERHOUSE PERFORMANCE - Handles heavy-duty 40 Amp loads with ease for reliable HVAC operation
PRECISION VOLTAGE CONTROL - 240V coil ensures seamless integration with standard industrial systems
CERTIFIED SAFETY ASSURANCE - UL 508 & UL 60947-4-1 recognized for trusted, code-compliant installations
DURABLE CONTACT TECHNOLOGY - Silver Cadmium Oxide contacts deliver superior conductivity and longevity

The SUNLEE 3 Pole 40 Amp contactor features a 240V coil and silver cadmium oxide contacts, engineered for high durability and efficient HVAC control. UL recognized and A2L compliant, it fits Siemens 42CF35AG equivalents, ensuring seamless OEM replacement with certified safety and robust performance.

Specifications

ASIN	B0888DQ7X8
Batteries Required?	No
Best Sellers Rank	#7,877 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Motor Contactors
Customer Reviews	4.7 4.7 out of 5 stars (343)
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

F**R

11.04.2026

B**L

30.03.2026

T**.

16.02.2026

R**Y

2.05.2026

C**A

26.04.2026

R**I

14.03.2026

A**R

27.04.2026

J**A

19.04.2026

I**S

17.09.2024

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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