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Contactors

The electrical contactor has been around for over 100 years dating back to the early 1900's and today's modern contactor, though design changes for safety and performance have occurred, has functionally remained the same as its predecessors. The basic unit is comprised of 3 power poles, L1, L2 and L3 of and these poles are normally open. As the need for a more diverse offering has risen, there are now 2 pole, 4 pole and even contactors up to 12 poles (mostly for lighting applications) that are manufactured today.


A magnetic contactor is one of the most simple pieces of electrical components in the market today. The function is simple: power is applied to the coil (this is referred to as the coil voltage), which creates a magnetic field which pull the contactors armature together. This causes the 3 moving contacts to connect with the 6 fixed contacts thus allowing power to flow from the line side to the load side and onto the piece of equipment that is being operated.


There are endless applications that one would find a contactor being used to operate electrical equipment. For residential applications, 2 and 3-pole contactors are found in HVAC equipment, sewage pumps and outdoor lighting units. In the commerical arena, they can be found in countless applications, such as capacitor banks, isolation, assembly lines and operating motors and compressors.


When choosing the appropriate contactor for your application, it is important to determine both the horsepower and AMP rating needed along with the specific coil (control) voltage required. Confusion often occurs when trying to determine the AMP rating of a contactor as there are numerous different ratings based on the application.  For example, the 2 most common ratings are AC-3 (inductive) and AC-1 (resistive).  Manufacturers often specify their part numbers based off the AC-3 rating, which is the lower and more common rating to be used.  For example, Schneider Electric manufacturers a part number LC1D32, which is a 32 AMP contactor (AC-3), but is also rated for 50 AMP (AC-1). It is important to know which rating is appropriate when sizing for a specific application.

  • GE BCLF10 auxiliary contact

    BCLF10

    GE BCLF10 top mounted single pole auxiliary block with 1 N.O. contact. Each contactor can hold up to 4 of these auxiliary contact blocks. Tool less installation and screw terminals. Order the GE BCLF10 auxiliary contact today.

    MSRP: $19.00
    $8.46
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    Schneider Electric LC1D32 contactor Schneider Electric LC1D32 side label

    LC1D32

    Schneider Electric LC1D32 3 pole contactor rated at 32 AMPS AC-3 (50 AMPS AC-1) with an AC rated coil (choose coil option above). This IEC contactor comes with 1 normally open and 1 normally closed base mounted auxiliary contacts, screw terminals and...

    MSRP: $172.00
    Was: $97.19
    Now: $75.00
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  • Benshaw RSC-32-6AC120 contactor Benshaw RSC-32-6AC120 front dimensions

    RSC-32-6AC120

    Benshaw RSC-32-6AC120 32 AMP 3 pole contactor with a 120 volt coil and a set of side mounted auxiliary contacts, each with 1 normally open and 1 normally closed. This IEC contactor is rated for 10 H.P. @ 230 volt and 20 H.P. @ 460 volt 3 phase, comes...

    MSRP: $80.00
    $60.11
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  • Schneider Electric LC1D12 side label

    LC1D12

    Schneider Electric LC1D12 3 pole contactor rated at 12 AMPS AC-3 (25 AMPS AC-1) with an AC coil (must specify coil voltage above). This IEC contactor comes with 1 normally open and 1 normally closed base mounted auxiliary contacts, screw terminals and...

    MSRP: $119.00
    $68.54
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  • Benshaw RSC-9-6AC120 contactor Benshaw RSC-9-6AC120 front dimensions

    RSC-9-6AC120

    Benshaw RSC-9-6AC120 9 AMP 3 pole contactor with a 120 volt coil and a set of base mounted auxiliary contacts, 1 normally open and 1 normally closed. This IEC contactor is rated for 2 H.P. @ 230 volt and 5 H.P. @ 460 volt 3 phase, comes with screw...

    MSRP: $34.00
    $25.55
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  • Eaton / Cutler Hammer C25DNF340 definite purpose contactor C25DNF340 dimensions

    C25DNF340

    Eaton / Cutler Hammer C25DNF340 definite purpose 3 pole contactor rated at 40 AMPS with an AC coil (must specify coil voltage above). This definite purpose contactor has double quick connect terminals, metal base plate and is a direct physical and...

    MSRP: $171.00
    $42.40
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  • Schneider Electric LC1D09 contactor Schneider Electric LC1D09 side label

    LC1D09

    The Telemecanique LC1D09 3 pole, 9 AMP AC-3 (20 AMP AC-1) contactor by Schneider Electric is rated at 2 HP @ 230v and 5 HP @ 460v 3 Phase with an AC rated coil (must select coil voltage above). Each Schneider Electric 3 pole contactor comes with 1...

    MSRP: $94.00
    $54.14
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  • Schneider Electric LC1D18 contactor Schneider Electric LC1D18 side label

    LC1D18

    Schneider Electric LC1D18 3 pole contactor rated at 18 AMPS AC-3 (32 AMPS AC-1) with a an AC coil (must select voltage above). This IEC contactor comes with 1 normally open and 1 normally closed base mounted auxiliary contacts, screw terminals and mounts...

    MSRP: $136.00
    $83.03
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    Eaton C25DND330 definite purpose contactor C25DND330

    C25DND330

    Eaton / Cutler Hammer C25DND330 definite purpose 3 pole contactor rated at 30 AMPS with an AC coil (must specify coil voltage above). This definite purpose contactor has double quick connect terminals, metal base plate and is a direct physical and...

    MSRP: $136.00
    Was: $44.20
    Now: $38.50
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  • Schneider LC1D25 3 Pole Contactor Schneider Electric LC1D25 side view

    LC1D25

    Schneider Electric LC1D25 3 pole contactor rated at 25 AMPS AC-3 (40 AMPS AC-1) with an AC rated coil (must choose coil voltage above). This IEC contactor comes with 1 normally open and 1 normally closed base mounted auxiliary contacts, screw terminals...

    MSRP: $151.00
    $92.16
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  • LS GMC-22-AC120 contactor

    GMC-22-AC120

    LS GMC-22 3 pole 22 AMP contactor with a 120vAC coil Click here to see a PDF spec file on this LG GMC contactor Description- Covering four rating classes in single size.- 3-pole main contact- Finger proof design- DIN rail or screw mountable- Small...

    $41.16
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  • Benshaw RSC-18-6AC120 contactor Benshaw RSC-18-6AC120 front dimensions

    RSC-18-6AC120

    Benshaw RSC-18-6AC120 18 AMP 3 pole contactor with a 120 volt coil and a set of base mounted auxiliary contacts, 1 normally open and 1 normally closed. This IEC contactor is rated for 5 H.P. @ 230 volt and 10 H.P. @ 460 volt 3 phase, comes with screw...

    MSRP: $61.00
    $48.58
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