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Thermal overload relays for IEC contactors provide reliable and accurate thermally-operated protection from device or component overload or phase loss. Available in various amperage capacities, these bi-metallic relays offer adjustable trip settings for application flexibility.
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Thermal Overload Relays
Category Selection
Thermal overload relays, when used with IEC contactors, create an across-the-line starter and provide reliable and accurate protection from device or component overload. Modern design eliminates heater elements, and instead uses fixed bimetallic elements. These overload relays are designed to mount directly to their brand's series and size of contactor, and will detect when the motor is drawing excessive current due to overloads, locked rotor current, or open phases which could result in damage to the motor windings.
For part listings and specifications, go to Shop Now
Fuji TK-E Series Thermal Overload Relays
The TK-E series thermal overload relays are designed for use with Fuji SC-E series contactors and feature an adjustable current range up to 160A.
- Overload, phase loss protection
- Isolated N.O. and N.C. contacts
- Ambient temperature compensation
- Trip indicator
- Finger protection terminals
- Optional base units for separate mounting
- IEC-947, UL, CSA, CE
Starting at
$34.00
(TK26E-P10)
Fuji 3N Series Thermal Overload Relays
The 3N series thermal overload relays are compatible with Fuji Odyssey 3N contactors and feature an adjustable current range up to 360A.
- Overload, phase loss protection
- Isolated N.O. and N.C. contacts
- Ambient temperature compensation
- Trip indicator
- Protective terminal covers available
- IEC-947, UL, CSA, CE
Starting at
$187.00
(3NK4QL)
WEG RW17 Thermal Overload Relays
The RW17 series adjustable motor overload relays are designed for use with WEG CWC series contactors, with current ratings up to 23A.
- (1) N.O. and (1) N.C. contact
- Class 10A trip class
- Adjustable trip current
- Phase-loss sensitivity (All phases must be connected - see motor wiring diagrams)
- Ambient temperature compensation
- Hand/Auto/Reset button
- IP20 finger protection
Starting at
$20.00
(RW17-1D3-D004)
WEG RW27/67/117 Thermal Overload Relays
Newest Additions!
- WEG RW117 series IEC thermal overload relays
The RW27/67/117 series adjustable motor overload relays are designed for use with WEG CWB series contactors, with current ratings up to 140A. Accessories are available for separate mounting.
- (1) N.O. and (1) N.C. contact
- Class 10A trip class
- Adjustable trip current
- 3-pole version available
- Ambient temperature compensation
- Phase-loss and current unbalance sensitivity protection
- Hand/Auto/Reset button
Starting at
$28.00
(RW27-2D3-D008)
IronHorse HTOR Series Thermal Overload Relays
New!
IronHorse HTOR series bimetal-style overload relays protect AC circuits and motors against overloads, phase loss, long starting times, and prolonged stalling of the motor.
- Available in multiple frame sizes, in ratings up to 400A
- Phase-loss and current unbalance sensitivity protection
- Class 10A trip class
- Isolated N.O. and N.C. contacts
- Adjustable trip current
- Ambient temperature compensation
- IP20 finger protection
Starting at
$22.00
(HTOR32-0.16-S)
RTD Series Thermal Overload Relays
The RTD series adjustable motor overload relays are designed for use with GH15 Series contactors with current ratings up to 320A.
- (1) N.O. and (1) N.C. contact
- Adjustable current range
- Manual Stop button
- Test function
- Manual/Auto reset
- IP20 finger protection
Starting at
$74.00
(RTD32-60)
Eaton C306 Thermal Overload Relay
The Eaton C306 thermal overload relay is intended for use with Eaton Freedom Series AE16 motor starters. They feature electrically-isolated N.O. or N.C. contacts and require heater packs that are sold separately.
- Selectable manual or automatic reset operations
- Isolated N.O. or N.C. contacts
- Interchangeable Class 20 heater packs match motor FLA , calibrated for 1.0 and 1.15 service factors (ordered separately)
- Integral load lugs allow field wiring prior to heater pack installation
- Single-phase protection
- Ambient temperature compensation
- IP20 finger protection
Starting at
$252.00
(C306DN3B)
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