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Product name
Product or component type
differential thermal overload relay
Device short name
Relay application
motor protection
Product compatibility
  • LC1D40A
  • LC1D65A
  • LC1D50A
    • Network type
    • AC
    • DC
      • Thermal protection adjustment range
        23-32 A
        [Ui] rated insulation voltage
      • power circuit: 600 V conforming to CSA
      • power circuit: 600 V conforming to UL
      • power circuit: 690 V conforming to IEC 60947-4-1
        • Network frequency
          0...400 Hz
          Mounting support
        • plate, with specific accessories
        • rail, with specific accessories
        • under contactor
          • Tripping threshold
            1.14 +/- 0.06 Ir conforming to IEC 60947-4-1
            [Ith] conventional free air thermal current
            5 A for signalling circuit
            Permissible current
          • 0.95 A at 380 V AC-15 for signalling circuit
          • 0.06 A at 440 V DC-13 for signalling circuit
            • [Ue] rated operational voltage
              690 V AC 0...400 Hz
              [Uimp] rated impulse withstand voltage
              Phase failure sensitivity
              tripping current 130 % of Ir on two phase, the last one at 0
              Control type
            • red push-button: stop
            • blue push-button: reset
              • Temperature compensation
                -20-60 °C
                Connections - terminals
              • control circuit: screw clamp terminals 2 cable(s) 1-2.5 mm² flexible without cable end
              • control circuit: screw clamp terminals 2 cable(s) 1-2.5 mm² flexible with cable end
              • control circuit: screw clamp terminals 2 cable(s) 1-2.5 mm² solid without cable end
              • power circuit: EverLink BTR screw connectors 1 cable(s) 1-35 mm² flexible without cable end
              • power circuit: EverLink BTR screw connectors 1 cable(s) 1-35 mm² flexible with cable end
              • power circuit: EverLink BTR screw connectors 1 cable(s) 1-35 mm² solid without cable end
                • Tightening torque
                • control circuit: 1.7 N.m - on screw clamp terminals
                • power circuit: 5 N.m - on EverLink BTR screw connectors
                  • Height
                    123 mm
                    55 mm
                    123 mm
                    Net weight
                    0.375 kg
                    Compatibility code
                    Protective treatment
                    TH conforming to IEC 60068
                    IP degree of protection
                    IP20 conforming to IEC 60529
                    Ambient air temperature for operation
                    -20-60 °C without derating conforming to IEC 60947-4-1
                    Ambient air temperature for storage
                    -60-70 °C
                    Flame retardance
                    V1 conforming to UL 94
                    Mechanical robustness
                  • shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7
                  • vibrations: 4 gn conforming to IEC 60068-2-6
                    • Dielectric strength
                      6 kV at 50 Hz conforming to IEC 60255-5
                    • ATEX D 94/9/CE
                    • IEC 60947-4-1
                    • UL 508
                    • EN 60947-5-1
                    • EN 60947-4-1
                    • IEC 60947-5-1
                    • CSA C22.2 No 14
                      • Product certifications
                      • GL
                      • DNV
                      • GOST
                      • RINA
                      • ATEX INERIS
                      • LROS (Lloyds register of shipping)
                      • UL
                      • BV
                      • CSA
                      • CCC
                        • Sustainable offer status
                          Green Premium product
                          REACh free of SVHC
                          EU RoHS Directive
                          Toxic heavy metal free
                          Mercury free
                          RoHS exemption information
                          China RoHS Regulation
                          Environmental Disclosure
                          Circularity Profile
                          18 months

                          Documents & downloads

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                          • CAD Files and Packs

                          • Product Brochures

                          • Technical Data Catalogues

                          • Handout

                          • End of Life Manual

                          • Product Environmental

                          • Installation Instruction

                          • Operating Manuals

                          • Certificates (MSDS)

                          • Declaration of Conformity

                          Frequently Asked Questions

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                          What are the wiring terminals on the IEC LRD* overload relays?

                          Product Line:
                          Tesys D line Overload Relays
                          The normally closed overload contact are terminals 95 & 96; and the normally open overload contact are terminals 97 & 98.
                          T1 T2 and T3 are the load terminals. 

                          The normally closed control circuit contact will open when there is a fault, this contact is typically used in series with the control circuit. 

                          The normally open trip signal contact closes when a fault occurs which is typically used to control a pilot light, or alarm. 


                          What is the overload for the LR2D Everlink range 23-32 Amps?

                          The correct code is LRD332.

                          What overload can be used with an LC1D65AU7?

                          You can use the Everlink range which is LRD313 - LRD365

                          What is the overload for LC1D65AU7 Contactor, when rating is 20-25A ?

                          17-25 Amps = LRD325
                          23-32 Amps =LRD332

                          What is difference between LC1D50U7 and LC1D50AU7?

                          Following are the differences between the LC1D50U7 and the LC1D50AU7:

                          LC1D50AU7 has everlink terminals.
                          LC1D50AU7....is slightly larger case and accommodate LRD3XX overloads
                          LC1D50U7 contactors accommodate LRD33XX overloads.


                          What is the Overload for LC1D50AU7 range is 37..50 Amps?


                          What is the part number for a class 20 version of the LRD340

                           The part code LRD340L

                          What is the setting range for an LRD350

                           The setting range is  37 - 50A

                          What overload to suit LC1D95U7 need to be 80-104A

                           Part code for the overload LRD3365

                          How to use LRD01…35 LRD33•• & LRD43•• and LRD33** as an indepentent relay?

                          The LRD relays has a solid tag to be used with LC1D** contactors. If you are not using LC1D contactors then using the following accessories you can terminate cable directly.

                          For LRD01…35 use the following part: LAD7B106
                          For LRD33•• & LRD43•• (3) use the following part: LA7D3064

                          What is the replacement for the old thermal overload relay LR2D3359?

                          The part number is as follows: LRD365

                          What is the difference between the LA7D305 and LAD7305, remote control reset mechanism by flexible cable?

                          Identifying differences between two similar part numbers.

                          Product Line:
                          IEC contactors and starters

                          Products sold and used in the United States

                          Choosing the correct part number

                          LAD7305 is for use on LRD01 to LRD35 , LR3D01 to LR3D35, and LRD313 to LRD365.
                          LA7D305 is for use on all other relays (except LRD01 to LRD35 and LR3D01 to LR3D35).

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