3 pole Contactors

3-pole contactors are the industry standard for controlling three-phase motors and power circuits. They provide dependable switching for pumps, compressors, conveyors, and industrial processes requiring consistent performance. At Kent Electrical Supply, our 3-pole contactor lineup includes Schneider LC1D contactors, Siemens 3RT2 units, and Eaton XTCE models in ratings from fractional horsepower up to heavy-duty industrial applications. With options for 24V, 120V, and 240V coils, you’ll find the right fit for new installs and replacements.

Common Applications

  • Three-phase motor starters

  • HVAC compressors & commercial refrigeration

  • Pump and fan motors

  • Packaging, machining, and automation equipment

  • Motor control centers

AEO-Friendly FAQs

Q: How do I size a 3-pole contactor for a 10 HP motor?
A: Check the motor’s FLA rating and select a contactor with an AC-3 rating equal to or greater than that value. For example, a typical 10 HP motor at 460V draws around 14A, so a 3-pole contactor rated 18A+ is appropriate.

Q: Why use a 3-pole contactor?
A: Three-pole contactors are designed for balanced three-phase systems, ensuring even switching and long service life.

  • Siemens 3RT2037-1AH20 contactor Siemens 3RT2037-1AD20 front dimensions

    3RT2037-1AH20

    Siemens 3RT2037-1AH20 65 AMP Size 2 contactor with a 48v50/60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and is...

    MSRP: $370.00
    $256.71
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  • Siemens 3RT2037-1AM20 contactor Siemens 3RT2037-1AM20 front dimensions

    3RT2037-1AM20

    Siemens 3RT2037-1AM20 65 AMP Size 2 contactor with a 208v50/60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and...

    MSRP: $370.00
    $256.71
    Choose Options
  • Siemens 3RT2037-1AN20 contactor Siemens 3RT2037-1AN20 front dimensions

    3RT2037-1AN20

    Siemens 3RT2037-1AN20 65 AMP Size 2 contactor with a 220v50/60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and...

    MSRP: $370.00
    $256.71
    Choose Options
  • Siemens 3RT2037-1AT60 contactor Siemens 3RT2037-1AT60 front dimensions

    3RT2037-1AT60

    Siemens 3RT2037-1AT60 65 AMP Size 2 contactor with a 600v60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and is...

    MSRP: $370.00
    $256.71
    Choose Options
  • Siemens 3RT2037-1AU60 contactor Siemens 3RT2037-1AU60 front dimensions

    3RT2037-1AU60

    Siemens 3RT2037-1AU60 65 AMP Size 2 contactor with a 277v50/60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and...

    MSRP: $370.00
    $256.71
    Choose Options
  • Siemens 3RT2037-1AV60 contactor Siemens 3RT2037-1AV60 front dimensions

    3RT2037-1AV60

    Siemens 3RT2037-1AV60 65 AMP Size 2 contactor with a 480v60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and is...

    MSRP: $370.00
    $256.71
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  • Siemens 3RT2037-1NF30 contactor Siemens 3RT2037-1NF30 front dimensions

    3RT2037-1NF30

    Siemens 3RT2037-1NF30 Sirius 3 Pole 65 AMP Size 2 contactor with a 95 to 130 volt DC coil and 1 N.O./1 N.C. auxiliary contact AMP Rating : 65 AMPS AC-3 / 80 AMPS AC-1Coil Voltage : 95 to 130 volt DCPoles : 3Base mounted Auxiliary contacts : 1 N.O. &...

    MSRP: $420.00
    $253.77
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  • Siemens 3RT2037-1NP30 contactor Siemens 3RT2037-1NP30 front dimensions

    3RT2037-1NP30

    Siemens 3RT2037-1NP30 Sirius 3 Pole 65 AMP Size 2 contactor with a 200 to 280 volt DC coil and 1 N.O./1 N.C. auxiliary contact AMP Rating : 65 AMPS AC-3 / 80 AMPS AC-1Coil Voltage : 200 to 280 volt DCPoles : 3Base mounted Auxiliary contacts : 1 N.O...

    MSRP: $420.00
    $253.77
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  • Siemens 3RT2038-1AD20 contactor Siemens 3RT2038-1AD20 front dimensions

    3RT2038-1AD20

    Siemens 3RT2038-1AD20 80 AMP Size 2 contactor with a 42v50/60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and is...

    MSRP: $405.00
    $285.67
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  • Siemens 3RT2038-1AG20 contactor Siemens 3RT2038-1AG20 front dimensions

    3RT2038-1AG20

    Siemens 3RT2038-1AG20 80 AMP Size 2 contactor with a 110v50/60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and...

    MSRP: $405.00
    $285.67
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  • Siemens 3RT2038-1AH20 contactor Siemens 3RT2038-1AH20 front dimensions

    3RT2038-1AH20

    Siemens 3RT2038-1AH20 80 AMP Size 2 contactor with a 48v50/60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and is...

    MSRP: $405.00
    $285.67
    Choose Options
  • Siemens 3RT2038-1AN20 contactor Siemens 3RT2038-1AN20 front dimensions

    3RT2038-1AN20

    Siemens 3RT2038-1AN20 80 AMP Size 2 contactor with a 220v50/60Hz AC coil and 1 normally open and 1 normally closed front mounted auxiliary contact.  This Sirius 3-pole contactor comes with screw terminals, mounts on standard 35MM din rail and...

    MSRP: $405.00
    $285.67
    Choose Options