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 Controls 3 Pole 40 Amp Contactor 240v Coil Oem

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€ 77.20

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Description

⚡ Power up your HVAC game with Sunlee’s rock-solid contactor — reliability you can’t afford to miss!

QUALITY ASSURED - 100% electrical tested and UL recognized for guaranteed performance and safety compliance.
HEAT RESISTANT COIL - Class F insulation keeps the coil cool and burnout-free even in extreme heat environments.
UNIVERSAL COMPATIBILITY - Direct OEM fit for Siemens 42CF35AG and other major HVAC systems for effortless replacement.
INDUSTRIAL GRADE DURABILITY - Built to endure 1,000,000 mechanical and 250,000 electrical cycles for unmatched reliability.
PREMIUM SILVER CADMIUM CONTACTS - 25% larger, thicker contacts ensure superior conductivity and longevity under heavy loads.

The Sunlee 3 Pole 40 Amp 240V coil contactor is a professional-grade HVAC control component designed for industrial and commercial use. Featuring UL-recognized certification, robust silver cadmium oxide contacts, and a high-temp Class F coil insulation, it delivers exceptional durability and performance. Tested for over a million mechanical cycles and a quarter-million electrical operations, this contactor offers a reliable, universal fit replacement for Siemens 42CF35AG equivalents, making it the smart choice for managers seeking cost-effective, long-lasting HVAC solutions.

Specifications

ASIN	B0888DQ7X8
ASIN	B0888DQ7X8
Batteries Required?	No
Country of origin	China
Customer Reviews	4.7 4.7 out of 5 stars (344)
Customer reviews	4.7 4.7 out of 5 stars (344)
Date First Available	5 March 2021
Date First Available	5 March 2021
Item Weight	490 g
Item model number	DRC-3XU04CG
Item model number	DRC-3XU04CG
Manufacturer	sunlee controls
Manufacturer	sunlee controls
Material	cadmium
Product Dimensions	10 x 6.5 x 8.5 cm; 490 g
Product Dimensions	10 x 6.5 x 8.5 cm; 490 g
Size	3P 40A 208/240VAC

Reviews

I**S

My initial impression is positive. The contactor appears equal to the robust industrial units that I am familiar with from NA over a 50 year career in electrical engineering. The contacts look heavy enough for the current, good insulation, heavy duty connections and the 120 volt coil is powerful and silent. I am running it under load for a month before saying more. Initial thoughts are that this is not your usual Chinese made light weight electrics.

17.09.2024

F**R

Works great, easy installation.

11.04.2026

B**L

used n an electric convection oven. res rated at 50 amp here's snaps of old one failure

30.03.2026

T**.

Worked perfectly. I saved my self $1400 by replacing this part inside my Qmark Wall Heater! Direct replacement part was listing for $300.!!! Found this for $26! Worked like a charm easy swap

16.02.2026

A**R

Did good

27.04.2026

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TrustScore 4.5 | 7,300+ reviews

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