What is this unknown part?












2












$begingroup$


I'm tracing a circuit. What is this part?



one side of component



This is back of it.



other side of component






identification







share|improve this question











$endgroup$

















    2












    $begingroup$


    I'm tracing a circuit. What is this part?



    one side of component



    This is back of it.



    other side of component






    identification







    share|improve this question











    $endgroup$















      2












      2








      2





      $begingroup$


      I'm tracing a circuit. What is this part?



      one side of component



      This is back of it.



      other side of component






      identification







      share|improve this question











      $endgroup$




      I'm tracing a circuit. What is this part?



      one side of component



      This is back of it.



      other side of component






      identification




      identification






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 6 hours ago









      SamGibson

      10.9k41537




      10.9k41537










      asked 6 hours ago









      JtlJtl

      707




      707






















          3 Answers
          3






          active

          oldest

          votes


















          6












          $begingroup$

          It's a 1A 125°C (nominal) thermal fuse, rated to fuse at 121°C +/-2°C



          Operating temperature is up to 100°C.



          Made by Xiamen SET Electronics Co., Ltd in Xiamen China.



          enter image description here



          It is not resettable. Needs to be replaced.






          share|improve this answer











          $endgroup$













          • $begingroup$
            Why can't I measure conduction in the two legs?
            $endgroup$
            – Jtl
            5 hours ago






          • 1




            $begingroup$
            Maybe it's already burned out. Can't really tell from that photo- it should measure very low resistance. Or maybe you're not making good contact because the board is coated or whatever.
            $endgroup$
            – Spehro Pefhany
            5 hours ago





















          4












          $begingroup$

          F1 indicates a fuse on the silk screen.
          eg https://www.digikey.com/product-detail/en/littelfuse-inc/80812000440/WK6289-ND/2206338






          share|improve this answer









          $endgroup$









          • 2




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            6 hours ago



















          2












          $begingroup$

          It is called Thermal cut-off (TCO) / Thermal fuse.



          in the "SET F3" 3 indicates that it is rated to cut off at 121+/-2 ℃, 125 ℃(nominal temperature) rated for 100 ℃. where as F indicates rated for 1A load current.






          share|improve this answer









          $endgroup$













          • $begingroup$
            If more than 1A passes through it. It can open too or only from temperature?
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            In the original post and picture, the legs are no longer conducting and I checked inside. It has opened already. So this can occur without any obvious ambient rise in temperature. Isn't it.
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            4 hours ago











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          3 Answers
          3






          active

          oldest

          votes








          3 Answers
          3






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          6












          $begingroup$

          It's a 1A 125°C (nominal) thermal fuse, rated to fuse at 121°C +/-2°C



          Operating temperature is up to 100°C.



          Made by Xiamen SET Electronics Co., Ltd in Xiamen China.



          enter image description here



          It is not resettable. Needs to be replaced.






          share|improve this answer











          $endgroup$













          • $begingroup$
            Why can't I measure conduction in the two legs?
            $endgroup$
            – Jtl
            5 hours ago






          • 1




            $begingroup$
            Maybe it's already burned out. Can't really tell from that photo- it should measure very low resistance. Or maybe you're not making good contact because the board is coated or whatever.
            $endgroup$
            – Spehro Pefhany
            5 hours ago


















          6












          $begingroup$

          It's a 1A 125°C (nominal) thermal fuse, rated to fuse at 121°C +/-2°C



          Operating temperature is up to 100°C.



          Made by Xiamen SET Electronics Co., Ltd in Xiamen China.



          enter image description here



          It is not resettable. Needs to be replaced.






          share|improve this answer











          $endgroup$













          • $begingroup$
            Why can't I measure conduction in the two legs?
            $endgroup$
            – Jtl
            5 hours ago






          • 1




            $begingroup$
            Maybe it's already burned out. Can't really tell from that photo- it should measure very low resistance. Or maybe you're not making good contact because the board is coated or whatever.
            $endgroup$
            – Spehro Pefhany
            5 hours ago
















          6












          6








          6





          $begingroup$

          It's a 1A 125°C (nominal) thermal fuse, rated to fuse at 121°C +/-2°C



          Operating temperature is up to 100°C.



          Made by Xiamen SET Electronics Co., Ltd in Xiamen China.



          enter image description here



          It is not resettable. Needs to be replaced.






          share|improve this answer











          $endgroup$



          It's a 1A 125°C (nominal) thermal fuse, rated to fuse at 121°C +/-2°C



          Operating temperature is up to 100°C.



          Made by Xiamen SET Electronics Co., Ltd in Xiamen China.



          enter image description here



          It is not resettable. Needs to be replaced.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited 3 hours ago









          Ale..chenski

          26.8k11864




          26.8k11864










          answered 5 hours ago









          Spehro PefhanySpehro Pefhany

          205k5154410




          205k5154410












          • $begingroup$
            Why can't I measure conduction in the two legs?
            $endgroup$
            – Jtl
            5 hours ago






          • 1




            $begingroup$
            Maybe it's already burned out. Can't really tell from that photo- it should measure very low resistance. Or maybe you're not making good contact because the board is coated or whatever.
            $endgroup$
            – Spehro Pefhany
            5 hours ago




















          • $begingroup$
            Why can't I measure conduction in the two legs?
            $endgroup$
            – Jtl
            5 hours ago






          • 1




            $begingroup$
            Maybe it's already burned out. Can't really tell from that photo- it should measure very low resistance. Or maybe you're not making good contact because the board is coated or whatever.
            $endgroup$
            – Spehro Pefhany
            5 hours ago


















          $begingroup$
          Why can't I measure conduction in the two legs?
          $endgroup$
          – Jtl
          5 hours ago




          $begingroup$
          Why can't I measure conduction in the two legs?
          $endgroup$
          – Jtl
          5 hours ago




          1




          1




          $begingroup$
          Maybe it's already burned out. Can't really tell from that photo- it should measure very low resistance. Or maybe you're not making good contact because the board is coated or whatever.
          $endgroup$
          – Spehro Pefhany
          5 hours ago






          $begingroup$
          Maybe it's already burned out. Can't really tell from that photo- it should measure very low resistance. Or maybe you're not making good contact because the board is coated or whatever.
          $endgroup$
          – Spehro Pefhany
          5 hours ago















          4












          $begingroup$

          F1 indicates a fuse on the silk screen.
          eg https://www.digikey.com/product-detail/en/littelfuse-inc/80812000440/WK6289-ND/2206338






          share|improve this answer









          $endgroup$









          • 2




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            6 hours ago
















          4












          $begingroup$

          F1 indicates a fuse on the silk screen.
          eg https://www.digikey.com/product-detail/en/littelfuse-inc/80812000440/WK6289-ND/2206338






          share|improve this answer









          $endgroup$









          • 2




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            6 hours ago














          4












          4








          4





          $begingroup$

          F1 indicates a fuse on the silk screen.
          eg https://www.digikey.com/product-detail/en/littelfuse-inc/80812000440/WK6289-ND/2206338






          share|improve this answer









          $endgroup$



          F1 indicates a fuse on the silk screen.
          eg https://www.digikey.com/product-detail/en/littelfuse-inc/80812000440/WK6289-ND/2206338







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 6 hours ago









          Sunnyskyguy EE75Sunnyskyguy EE75

          63.8k22194




          63.8k22194








          • 2




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            6 hours ago














          • 2




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            6 hours ago








          2




          2




          $begingroup$
          Seems to be a thermofuse to me. No current noted, but 125°C.
          $endgroup$
          – Janka
          6 hours ago




          $begingroup$
          Seems to be a thermofuse to me. No current noted, but 125°C.
          $endgroup$
          – Janka
          6 hours ago











          2












          $begingroup$

          It is called Thermal cut-off (TCO) / Thermal fuse.



          in the "SET F3" 3 indicates that it is rated to cut off at 121+/-2 ℃, 125 ℃(nominal temperature) rated for 100 ℃. where as F indicates rated for 1A load current.






          share|improve this answer









          $endgroup$













          • $begingroup$
            If more than 1A passes through it. It can open too or only from temperature?
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            In the original post and picture, the legs are no longer conducting and I checked inside. It has opened already. So this can occur without any obvious ambient rise in temperature. Isn't it.
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            4 hours ago
















          2












          $begingroup$

          It is called Thermal cut-off (TCO) / Thermal fuse.



          in the "SET F3" 3 indicates that it is rated to cut off at 121+/-2 ℃, 125 ℃(nominal temperature) rated for 100 ℃. where as F indicates rated for 1A load current.






          share|improve this answer









          $endgroup$













          • $begingroup$
            If more than 1A passes through it. It can open too or only from temperature?
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            In the original post and picture, the legs are no longer conducting and I checked inside. It has opened already. So this can occur without any obvious ambient rise in temperature. Isn't it.
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            4 hours ago














          2












          2








          2





          $begingroup$

          It is called Thermal cut-off (TCO) / Thermal fuse.



          in the "SET F3" 3 indicates that it is rated to cut off at 121+/-2 ℃, 125 ℃(nominal temperature) rated for 100 ℃. where as F indicates rated for 1A load current.






          share|improve this answer









          $endgroup$



          It is called Thermal cut-off (TCO) / Thermal fuse.



          in the "SET F3" 3 indicates that it is rated to cut off at 121+/-2 ℃, 125 ℃(nominal temperature) rated for 100 ℃. where as F indicates rated for 1A load current.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 4 hours ago









          ElectronElectron

          1,075213




          1,075213












          • $begingroup$
            If more than 1A passes through it. It can open too or only from temperature?
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            In the original post and picture, the legs are no longer conducting and I checked inside. It has opened already. So this can occur without any obvious ambient rise in temperature. Isn't it.
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            4 hours ago


















          • $begingroup$
            If more than 1A passes through it. It can open too or only from temperature?
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            In the original post and picture, the legs are no longer conducting and I checked inside. It has opened already. So this can occur without any obvious ambient rise in temperature. Isn't it.
            $endgroup$
            – Jtl
            4 hours ago










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            4 hours ago
















          $begingroup$
          If more than 1A passes through it. It can open too or only from temperature?
          $endgroup$
          – Jtl
          4 hours ago




          $begingroup$
          If more than 1A passes through it. It can open too or only from temperature?
          $endgroup$
          – Jtl
          4 hours ago












          $begingroup$
          In the original post and picture, the legs are no longer conducting and I checked inside. It has opened already. So this can occur without any obvious ambient rise in temperature. Isn't it.
          $endgroup$
          – Jtl
          4 hours ago




          $begingroup$
          In the original post and picture, the legs are no longer conducting and I checked inside. It has opened already. So this can occur without any obvious ambient rise in temperature. Isn't it.
          $endgroup$
          – Jtl
          4 hours ago












          $begingroup$
          Its already burned out. these are single time operation devices. yeh may be.
          $endgroup$
          – Electron
          4 hours ago




          $begingroup$
          Its already burned out. these are single time operation devices. yeh may be.
          $endgroup$
          – Electron
          4 hours ago


















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