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.

  • E16DU6.3 | ABB E16Du-6.3 Electronic Overload Relay

    E16DU6.3

    $123.93
    $192.93
    E16Du-6.3 Electronic Overload Relay
  • EF146-150 | ABB Eol,Af116-146,Class-102030,54-150A

    EF146-150

    $323.94
    $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

    $622.94
    $1,257.35
    Eol,Af265-370,Class-102030,115-380A
  • EF460 | ABB Electronic Overload 150-500 A

    EF460

    $758.94
    $1,625.15
    Electronic Overload 150-500 A
  • EF750 | ABB Electronic Overload 250-800 A

    EF750

    $748.94
    $1,869.76
    Electronic Overload 250-800 A
  • EF96-100 | ABB Eol,Af80-96,Class-10/20/30,36-100A

    EF96-100

    $426.65
    $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

    $380.50
    $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
  • Ex9R100B70A Noark Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 55~70 A

    Ex9R100B70A

    $74.01
    $82.23
    Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 55~70 A
  • Ex9R100B80A Noark Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 63~80 A

    Ex9R100B80A

    $74.01
    $82.23
    Thermal Overload Relay, Ex9R, 100 A, Use with Ex9C40-100, Trip Class 10, 63~80 A
  • Ex9R12B0.16A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.1~0.16 A

    Ex9R12B0.16A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.1~0.16 A
  • Ex9R12B0.25A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.16~0.25 A

    Ex9R12B0.25A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.16~0.25 A
  • Ex9R12B0.4A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.25~0.4 A

    Ex9R12B0.4A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.25~0.4 A
  • Ex9R12B0.63A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.4~0.63 A

    Ex9R12B0.63A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.4~0.63 A
  • Ex9R12B1.6A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 1~1.6 A

    Ex9R12B1.6A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 1~1.6 A
  • Ex9R12B10A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 7~10 A

    Ex9R12B10A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 7~10 A
  • Ex9R12B12A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 9~12 A

    Ex9R12B12A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 9~12 A
  • Ex9R12B1A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.63~1 A

    Ex9R12B1A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 0.63~1 A
  • Ex9R12B2.5A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 1.6~2.5 A

    Ex9R12B2.5A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 1.6~2.5 A
  • Ex9R12B4A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 2.5~4 A

    Ex9R12B4A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 2.5~4 A
  • Ex9R12B6A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 2.5~4 A

    Ex9R12B6A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 2.5~4 A
  • Ex9R12B8A Noark Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 5.5~8 A

    Ex9R12B8A

    $26.24
    $29.16
    Thermal Overload Relay, Ex9R, 12A, Use with Ex9CS06-12, Trip Class 10, 5.5~8 A
  • Ex9R185B115A Noark Thermal Overload Relay, Ex9R, 185 A, Use with Ex9C115-185, Trip Class 10, 75~115 A

    Ex9R185B115A

    $227.62
    $252.91
    Thermal Overload Relay, Ex9R, 185 A, Use with Ex9C115-185, Trip Class 10, 75~115 A
  • Ex9R185B150A Noark Thermal Overload Relay, Ex9R, 185 A, Use with Ex9C115-185, Trip Class 10, 110~150 A

    Ex9R185B150A

    $227.62
    $252.91
    Thermal Overload Relay, Ex9R, 185 A, Use with Ex9C115-185, Trip Class 10, 110~150 A
  • Ex9R185B210A Noark Thermal Overload Relay, Ex9R, 185 A, Use with Ex9C115-185, Trip Class 10, 140~210 A

    Ex9R185B210A

    $227.62
    $252.91
    Thermal Overload Relay, Ex9R, 185 A, Use with Ex9C115-185, Trip Class 10, 140~210 A
  • Ex9R38B1.6A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 1~1.6 A

    Ex9R38B1.6A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 1~1.6 A
  • Ex9R38B10A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 7~10 A

    Ex9R38B10A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 7~10 A
  • Ex9R38B13A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 9~13 A

    Ex9R38B13A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 9~13 A
  • Ex9R38B18A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 12~18 A

    Ex9R38B18A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 12~18 A
  • Ex9R38B1A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 0.63~1 A

    Ex9R38B1A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 0.63~1 A
  • Ex9R38B2.5A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 1.6~2.5 A

    Ex9R38B2.5A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 1.6~2.5 A
  • Ex9R38B24A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 16~24 A

    Ex9R38B24A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 16~24 A
  • Ex9R38B32A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 23~32 A

    Ex9R38B32A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 23~32 A
  • Ex9R38B38A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 30~38 A

    Ex9R38B38A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 30~38 A
  • Ex9R38B4A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 2.5~4 A

    Ex9R38B4A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 2.5~4 A
  • Ex9R38B6A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 4~6 A

    Ex9R38B6A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 4~6 A
  • Ex9R38B8A Noark Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 5.5~8 A

    Ex9R38B8A

    $51.44
    $57.15
    Thermal Overload Relay, Ex9R, 38 A, Use with Ex9C09-38, Trip Class 10, 5.5~8 A
  • Ex9R500B225A Noark Thermal Overload Relay, Ex9R, 500 A, Use with Ex9C225-500, Trip Class 10, 160~225 A

    Ex9R500B225A

    $697.33
    $774.81
    Thermal Overload Relay, Ex9R, 500 A, Use with Ex9C225-500, Trip Class 10, 160~225 A
  • Ex9R500B300A Noark Thermal Overload Relay, Ex9R, 500 A, Use with Ex9C225-500, Trip Class 10, 210~300 A

    Ex9R500B300A

    $697.33
    $774.81
    Thermal Overload Relay, Ex9R, 500 A, Use with Ex9C225-500, Trip Class 10, 210~300 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.