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Compact black rectangular HVAC contactor with silver terminals and mounting tabs

SUPCO

SUPCO DP40242 Contactor 40 FLA 50 RLA 24V 2 Pole

SKU CH-MMT3-NGQ7V MPN DP40242

A 24 V coil contactor rated 40 FLA and 50 RLA with two poles and interchangeable mounting for HVAC&R systems

  • Rated voltage24
  • Reliable HVAC switching with 40 FLA and 50 RLA ratings
  • Safe 24-volt coil operation for low-voltage control circuits
  • Space-saving compact design fits smaller panels and leaves more wiring room
  • Silver cadmium oxide contacts deliver durable switching performance
  • CSA and UL approved for code-compliant installations

HVAC Contactor 40 FLA 24 V

The Supco DP40242 is a two-pole contactor rated at 40 FLA and 50 RLA with a 24 volt coil. It is designed for HVAC and refrigeration control panels where a compact, universal mounting footprint is required.

Silver cadmium oxide contacts run cool

The contact material resists welding and erosion, keeping temperature rise low during normal cycling. CSA and UL approvals confirm the component meets recognised safety standards for continuous duty in heating and cooling equipment.

Interchangeable mounting saves panel space

The universal footprint matches many competitive contactors, so the unit drops into existing enclosures without re-drilling. Space-saving dimensions leave more room for wiring and allow smaller panel layouts in retrofit or new-build installations.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 80% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameSupco
Model nameDP40242
Power
Rated voltage24

Questions about this item

How do I wire the 24 V coil on this DP40242 contactor and which step is often missed?

Connect the 24 V control circuit to the coil terminals; the step often missed is confirming the coil voltage matches the system before energising.

What maintenance will the silver cadmium oxide contacts need over time?

Inspect the contacts periodically for pitting or wear; replace the contactor if the contacts show excessive erosion or fail to close cleanly.

At what sustained load does the 40 FLA rating become the limiting factor?

The 40 FLA rating is the continuous full-load amp limit; sustained current above 40 amps will exceed the contactor’s design capacity.

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