Thermal Relays

A thermal relay is a type of relay that protects a motor from overcurrent. It is called "thermal relay" because it operates after detecting a rise in the temperature of the motor coil. In some designs, the terminals are equipped with a cover to improve safety by protecting against electric shocks during maintenance or inspection. Most thermal relays are composed of a heater element and bi-metal section. When current flows through the heater element, the bi-metal section bends and the contacts open. If the relay is activated, eliminate the cause before restarting operation. Types include an automatic type that resets automatically after activation, and a manual type where the user resets the relay by pressing a button after the bi-metal has cooled. Because a thermal relay itself does not have a shut-off function, it is usually used in combination with an electromagnetic contactor.

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Type
Operating Method
Motor Capacity 400-440V AC Class(kW/A)
Motor Capacity 200-220V AC Class(kW/A)
Coil Voltage Rating(V)
Number of Electrodes
Auxiliary Contact
Representative Standard
Length(mm)
Width(mm)
Thickness(mm)

    New SC · NEO SC Series Thermal Relay

      TH-T Series Thermal Relay

        2E Thermal Relay

          Thermal Relay

            MS-N Series Standard · with 2 element Thermal Relay (for electromagnetic switch · single mounting not allowed)

              Thermal Relay SK Series TK123 F-QuiQ Spring Terminal Type

              Brand

              Fuji Electric

              Mitsubishi Electric Automation

              Fuji Electric

              MISUMI

              Mitsubishi Electric Automation

              Fuji Electric

              Product Series

              New SC · NEO SC Series Thermal Relay

              TH-T Series Thermal Relay

              2E Thermal Relay

              Thermal Relay

              MS-N Series Standard · with 2 element Thermal Relay (for electromagnetic switch · single mounting not allowed)

              Thermal Relay SK Series TK123 F-QuiQ Spring Terminal Type

              CAD
              • 2D
              Days to Ship Same Day

              Stock Items Included

              4 Days 4 Days Same Day

              Stock Items Included

              12 Days 18 Days
              Specifications
                    • Meets CE marking
                    • Meets VDE (Association for Electrical, Electronic & Information Technologies standards)
                    • Meets BS (British Standards)
                    • Meets standards defined by IEC (International electrotechnical Commission)
                        Type--Thermal relay--Thermal relay
                        Operating Method-----Irreversible type
                        Motor Capacity 400-440V AC Class(kW/A)----0.4/1.3 ~ 55/105-
                        Motor Capacity 200-220V AC Class(kW/A)---0.05/0.52 ~ 15/550.2/1.3 ~ 30/105-
                        Coil Voltage Rating(V)-----200/400
                        Number of Electrodes3-3333
                        Auxiliary Contact1a1b1a1b1a1b1a1b1a1b1a1b
                        Representative StandardCE / UL / CUL / TUV / CCC / CSA-CE / UL / CUL / TUV / CCC / CSACECCCCE / UL / CSA
                        Length(mm)77 ~ 18351 ~ 73.561.7 ~ 64.573.2 ~ 80.645 ~ 11279.5
                        Width(mm)44 ~ 19745 ~ 8945 ~ 5345 ~ 5555 ~ 8745
                        Thickness(mm)59.5 ~ 18276.5 ~ 83.552 ~ 5563.7 ~ 10076.5 ~ 10563.5

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