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Contactors

All electric motors have a lifespan, and to keep them running efficiently and safely they must be protected. One of the main causes of failure is electrical overload, sometimes called overcurrent. When a motor draws more current than it is designed to handle it causes the temperature to build-up resulting in overheating. This damages motor windings and coils. It is important to protect the motor and its circuit, and this is where the use of contactor overload relays can help.RS Components offer an extensive range of high-quality contactor overload relays from leading industry brands including Schneider Electric, Siemens, ABB, Eaton, Lovato, and Rockwell Automation.What is overload protection?Overload is where a motor draws a high current above its rated value for an extended amount of time. Overload causes overheating of the motor causing damage. To prevent this from happening devices such as contactor relays are specifically designed for industrial control motor protection. They are used with contactors as part of a motor starter or in a control panel or centre.What are the different types of contactor overload relays?The motor protection devices can be classified into two main types which are thermal types and electronic types.Thermal overload relaysUtilise a bi-metallic plate located near a heating element. When excessive current is passed through the heating element N/C (Normally Closed) contacts switch over and opens contacts. This interrupts power from flowing to the contactor’s control circuit. Thermal overloads usually offer an adjustable current range as well as a manual or automatic reset option.Electronic RelaysElectronic overload relays don’t have a bi-metallic mechanism, Instead, they work by using components such as temperature sensors to measure the load current. They are generally more accurate than thermal devices and they usually have a wider current range, a selectable trip class provides enhanced trip protection against single phasing against the motor.

Showing 481–504 of 613 results

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  • Product image for DILM CONTACTOR,15KW 230VAC 1MAKE CONTACT

    Eaton xStart DILM 3 Pole Contactor - 32 A, 230 V ac Coil, 3NO, 15 kW

    RS Stock No.
    4930315
    Brand
    Eaton
    Mfr. Prt No.
    277260 DILM32-10(230V50HZ,240V60HZ)
    VND
    3,847,159.36
  • Product image for AC controlled contactor,32A 24Vac coil

    Schneider Electric TeSys D LC1D 3 Pole Contactor - 32 A, 24 V ac Coil, 3NO, 15 kW

    RS Stock No.
    3949655
    Brand
    Schneider Electric
    Mfr. Prt No.
    LC1D32B7
    VND
    3,861,931.04
  • Product image for Schneider Electric Thermal Overload Relay - 1NO + 1NC, 23 → 32 A F.L.C, 32 A Contact Rating, TeSys D

    Schneider Electric Thermal Overload Relay - 1NO + 1NC, 23 → 32 A F.L.C, 32 A Contact Rating, TeSys D

    RS Stock No.
    7276201
    Brand
    Schneider Electric
    Mfr. Prt No.
    LRD332
    VND
    3,945,956.96
  • Product image for S0 Contactor 15kW 24Vdc NC aux screw

    Siemens SIRIUS Innovation 3RT2 3 Pole Contactor - 32 A, 24 V dc Coil, 3NO, 15 kW

    RS Stock No.
    7061386
    Brand
    Siemens
    Mfr. Prt No.
    3RT2027-1BB40
    VND
    3,982,982.08
  • Product image for Schneider Electric TeSys D LC1D 3 Pole Contactor - 38 A, 220 V ac Coil, 3NO, 18.5 kW

    Schneider Electric TeSys D LC1D 3 Pole Contactor - 38 A, 220 V ac Coil, 3NO, 18.5 kW

    RS Stock No.
    7447421
    Brand
    Schneider Electric
    Mfr. Prt No.
    LC1D38M7
    VND
    4,049,358.72
  • Product image for CONTACTOR 18A 24VDC LPL

    Schneider Electric TeSys D LC1D 3 Pole Contactor - 18 A, 24 V dc Coil, 3NO, 7.5 kW

    RS Stock No.
    3949728
    Brand
    Schneider Electric
    Mfr. Prt No.
    LC1D18BD
    VND
    4,053,003.68
  • Product image for CONT EVERLINK 3P AC3 440V 40A 24VAC

    Schneider Electric TeSys D LC1D 3 Pole Contactor - 40 A, 24 V ac Coil, 3NO, 18.5 kW

    RS Stock No.
    6658009
    Brand
    Schneider Electric
    Mfr. Prt No.
    LC1D40AB7
    VND
    4,117,270.08
  • Product image for Siemens Control Relay - 3NO, 22 A F.L.C, 40 A Contact Rating, 230 V ac, 3P

    Siemens Control Relay - 3NO, 22 A F.L.C, 40 A Contact Rating, 230 Vac, 3P, SIRIUS Innovation

    RS Stock No.
    1229449
    Brand
    Siemens
    Mfr. Prt No.
    3RT2026-1AL20
    VND
    4,176,932.32
  • Product image for 3 POLE CONTACTOR 18.5KW 24-60AC, 20-60DC

    ABB AF Range AF38 3 Pole Contactor - 50 A, 24 V ac/dc Coil, 3NO, 18.5 kW

    RS Stock No.
    7649012
    Brand
    ABB
    Mfr. Prt No.
    1SBL297001R1100 AF38-30-00-11
    VND
    4,189,401.92
  • -42.00%
    Product image for Acti9 iCT Contactor 100A 4NO 220/240Vac

    Schneider Electric Acti 9 iCT 4 Pole Contactor - 100 A, 230 V ac Coil, 4NO

    RS Stock No.
    7913029
    Brand
    Schneider Electric
    Mfr. Prt No.
    A9C20884
    VND
    8,066,488.32
    VND
    4,206,283.84
  • Product image for Schneider Electric TeSys D LC1D 3 Pole Contactor - 25 A, 12 V dc Coil, 3NO

    Schneider Electric TeSys D LC1D 3 Pole Contactor - 25 A, 12 V dc Coil, 3NO

    RS Stock No.
    7447368
    Brand
    Schneider Electric
    Mfr. Prt No.
    LC1D25JD
    VND
    4,219,328.96
  • Product image for Off delay pneumatic timer,1-30sec

    Schneider Electric TeSys Pneumatic Timer

    RS Stock No.
    3949857
    Brand
    Schneider Electric
    Mfr. Prt No.
    LADR2
    VND
    4,222,398.40
  • Product image for DC controlled contactor,25A 24Vdc coil

    Schneider Electric TeSys D LC1D 3 Pole Contactor - 25 A, 24 V dc Coil, 3NO, 11 kW

    RS Stock No.
    4001934
    Brand
    Schneider Electric
    Mfr. Prt No.
    LC1D25BL
    VND
    4,237,361.92
  • Product image for Insta Contactor 4NO 230V

    Siemens SENTRON 5TT 4 Pole Contactor - 40 A, 24 V ac/dc Coil, 4NO

    RS Stock No.
    1511257
    Brand
    Siemens
    Mfr. Prt No.
    5TT5040-2
    VND
    4,282,252.48
  • Product image for 4 pole NO coil contactor,40A,24Vdc,AC1

    Schneider Electric TeSys D LC1D 4 Pole Contactor - 40 A, 24 V dc Coil, 4NO

    RS Stock No.
    7447585
    Brand
    Schneider Electric
    Mfr. Prt No.
    LC1DT40BL
    VND
    4,320,812.32
  • Product image for 100A HERMETIC SEALED CONTACTOR SIDE MT

    TE Connectivity KILOVAC LEV100 Contactor, 12 V dc Coil

    RS Stock No.
    0420390
    Brand
    TE Connectivity
    Mfr. Prt No.
    LEV100A4ANH 4-1618391-0
    VND
    4,326,759.36
  • Product image for CONTACTOR 12A 24V DC LPL

    Schneider Electric TeSys D LC1D 3 Pole Contactor - 12 A, 24 V dc Coil, 3NO, 5.5 kW

    RS Stock No.
    3949762
    Brand
    Schneider Electric
    Mfr. Prt No.
    LC1D12BD
    VND
    4,327,526.72
  • Product image for Function module for star-delta S00/S0

    Siemens Overload Relay - 2NO, 5.5 kW, 24 → 240 V ac/dc, SIRIUS Innovation

    RS Stock No.
    7060696
    Brand
    Siemens
    Mfr. Prt No.
    3RA2816-0EW20
    VND
    4,345,367.84

  • Schneider Electric TeSys D Green LC1D 3 Pole Contactor - 25 A, 230 V ac Coil, 3NO, 11 kW

    VND
    0.00
  • Product image for ZB65 40-57A OVERLOAD RELAY

    Eaton Overload Relay - 1NO + 1NC, 40 → 57 A F.L.C, 57 A Contact Rating, 7.5 W, 500 Vac

    RS Stock No.
    5130314
    Brand
    Eaton
    Mfr. Prt No.
    278459 ZB65-57
    VND
    4,394,287.04
  • Product image for 1 NO contactor,11kW 110Vac coil

    ABB A Line A26 3 Pole Contactor - 45 A, 110 V ac Coil, 3NO, 11 kW

    RS Stock No.
    4451014
    Brand
    ABB
    Mfr. Prt No.
    1SBL241001R8410
    VND
    4,402,728.00

  • Schneider Electric TeSys D LC1D 4 Pole Contactor - 40 A, 24 V dc Coil, 2NO + 2NC

    RS Stock No.
    7447320
    Brand
    Schneider Electric
    Mfr. Prt No.
    LC1D258BD
    VND
    4,404,070.88
  • Product image for Thermal overload relay 27 - 32 A

    Siemens Overload Relay - 1NO + 1NC, 27 → 32 A F.L.C, 32 A Contact Rating, 15 kW, 3P, SIRIUS Innovation

    RS Stock No.
    7061689
    Brand
    Siemens
    Mfr. Prt No.
    3RU2126-4EC0
    VND
    4,420,377.28