Overload Relays

Protect your motors from overcurrent and overheating with ABB overload relays. Available in thermal and electronic options, our relays provide reliable motor protection for a variety of applications, including pumps, conveyors, and HVAC systems. Ensure your operations run smoothly and safely with the right motor protection solution from Wistex.

Need assistance selecting the right overload relay? Contact our team.

  • CCL5-11 | ABB A Aux Blk,1No Lead,1Nc Lag

    CCL5-11

    $19.59
    $39.21
    A Aux Blk,1No Lead,1Nc Lag
  • DB16E | ABB Sep Mtg Adapter For E16Du

    DB16E

    $13.87
    $25.65
    Sep Mtg Adapter For E16Du
  • DB200 | ABB Sep Mtg Kit,Ta110,Less Lugs

    DB200

    $44.94
    $102.64
    Sep Mtg Kit,Ta110,Less Lugs
  • DB200A | ABB Sep Mtg Kit,Ta110,W/Lugs

    DB200A

    $58.78
    $117.64
    Sep Mtg Kit,Ta110,W/Lugs
  • DB42 | ABB Tf42 Panel Mount Kit

    DB42

    $33.09
    $59.88
    Tf42 Panel Mount Kit
  • DB45E | ABB E45Du Separate Mounting Kit

    DB45E

    $49.59
    E45Du Separate Mounting Kit
  • DB45EF | ABB Ef45 Single Mounting Kit

    DB45EF

    $54.22
    $102.64
    Ef45 Single Mounting Kit
  • DB65 | ABB Seperate Mtg Kit Tf65

    DB65

    $29.62
    $56.44
    Seperate Mtg Kit Tf65
  • DB80 | ABB Separate Mtg Kit-Ta42,75,80

    DB80

    $38.89
    $76.98
    Separate Mtg Kit-Ta42,75,80
  • DB80E | ABB E80Du Separate Mounting Kit

    DB80E

    $61.95
    E80Du Separate Mounting Kit
  • DB96 | ABB Separate Mtg Kit Ef96

    DB96

    $56.93
    $107.77
    Separate Mtg Kit Ef96
  • E16DU0.32 | ABB E16Du-0.32 Electronic Overload Rela

    E16DU0.32

    $147.40
    $192.93
    E16Du-0.32 Electronic Overload Rela
  • E16DU1.0 | ABB E16Du-1.0 Electronic Overload Relay

    E16DU1.0

    $147.40
    $192.93
    E16Du-1.0 Electronic Overload Relay
  • E16DU18.9 | ABB E16Du-18.9 Electronic Overload Rela

    E16DU18.9

    $121.91
    $192.93
    E16Du-18.9 Electronic Overload Rela
  • E16DU2.7 | ABB E16Du-2.7 Electronic Overload Relay

    E16DU2.7

    $124.05
    $192.93
    E16Du-2.7 Electronic Overload Relay
  • E16DU6.3 | ABB E16Du-6.3 Electronic Overload Relay

    E16DU6.3

    $123.72
    $192.93
    E16Du-6.3 Electronic Overload Relay
  • EF146-150 | ABB Eol,Af116-146,Class-102030,54-150A

    EF146-150

    $312.48
    $812.57
    Eol,Af116-146,Class-102030,54-150A
  • EF19-0.32 | ABB Elec O/L 0.10-0.32A, Class 10E, 20

    EF19-0.32

    $71.94
    $179.63
    Elec O/L 0.10-0.32A, Class 10E, 20
  • EF19-1.0 | ABB Elec O/L 0.30-1.0A, Class 10E, 20E

    EF19-1.0

    $71.94
    $179.63
    Elec O/L 0.30-1.0A, Class 10E, 20E
  • EF370-380 | ABB Eol,Af265-370,Class-102030,115-380A

    EF370-380

    $616.94
    $1,257.35
    Eol,Af265-370,Class-102030,115-380A
  • EF460 | ABB Electronic Overload 150-500 A

    EF460

    $755.94
    $1,625.15
    Electronic Overload 150-500 A
  • EF750 | ABB Electronic Overload 250-800 A

    EF750

    $746.94
    $1,869.76
    Electronic Overload 250-800 A
  • EF96-100 | ABB Eol,Af80-96,Class-10/20/30,36-100A

    EF96-100

    $341.94
    $735.58
    Eol,Af80-96,Class-10/20/30,36-100A
  • EF96-56 | ABB Eol Af80-96 Class 10/20/30 20-56A

    EF96-56

    $380.69
    $732.42
    Eol Af80-96 Class 10/20/30 20-56A
  • Ex9R100B104A Noark Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 80~104 A

    Ex9R100B104A

    $74.01
    $82.23
    Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 80~104 A
  • Ex9R100B32A Noark Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 23~32 A

    Ex9R100B32A

    $74.01
    $82.23
    Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 23~32 A
  • Ex9R100B40A Noark Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 30~40 A

    Ex9R100B40A

    $74.01
    $82.23
    Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 30~40 A
  • Ex9R100B50A Noark Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 37~50 A

    Ex9R100B50A

    $74.01
    $82.23
    Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 37~50 A
  • Ex9R100B65A Noark Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 48~65 A

    Ex9R100B65A

    $74.01
    $82.23
    Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 48~65 A

Overload Relays We Offer

Wistex offers a full range of overload relays designed to protect motors from overheating, phase loss, and excessive current. Whether you need thermal or electronic protection, we provide reliable solutions for industrial applications across manufacturing, pumping, and HVAC systems.

Thermal Overload Relays

Thermal Overload Relays

Thermal overload relays use a bimetallic strip that reacts to heat generated by excess current. As the strip bends under heat, it trips the relay to disconnect the motor, preventing damage. Thermal relays are highly effective for basic motor protection and are ideal for rugged environments where simplicity and reliability are key.

Electronic Overload Relays

Electronic overload relays use digital sensors to detect current surges with greater precision and speed. They offer adjustable settings, diagnostics, and advanced features like phase failure detection. Electronic relays are well-suited for applications requiring flexible, programmable motor protection and integration with control systems.

Electronic Overload Relays

Applications for Overload Relays

Our overload relays are ideal for:

  • Motor protection for water pumps and industrial fans
  • Conveyor belt systems in manufacturing
  • HVAC system compressors and blower motors

Complete your motor control system with contactors and soft starters.

Why Choose Wistex for Overload Relays & Motor Protection

Protect your investments with overload relays from Wistex. Our selection of thermal and electronic overload relays from ABB provides vital protection against overcurrent, phase failure, and overheating — essential for industries like manufacturing, pumping, and HVAC.

Why choose Wistex for overload relays?

  • Specialized expertise in motor protection and system design
  • In-stock options for fast shipping when downtime isn’t an option
  • Top brands like ABB for unmatched reliability
  • Support beyond the sale — helping you with setup, replacement, and scaling needs

Keep your motors safe and your business moving forward with overload relays from Wistex.

FAQs about Overload Relays

Understand how overload relays protect your motors and improve operational reliability.

Overload relays detect excessive current flowing through a motor circuit. If the current exceeds a preset level for too long (indicating a jam, blockage, or overload), the relay trips to disconnect the motor, preventing overheating and mechanical damage.

Thermal overload relays use a mechanical bimetallic strip that bends when heated by excess current. Electronic overload relays use sensors and processors for faster, more precise detection of overload conditions, often with more flexible setting options.

Replace an overload relay if it trips frequently without valid cause, shows inconsistent operation, suffers visible damage, or if the protected motor has been upgraded to a higher horsepower. Routine inspection during maintenance can help catch early signs of failure.