What is this unknown part?

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP












8












$begingroup$


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



one side of component



This is back of it.



other side of component










share|improve this question











$endgroup$
















    8












    $begingroup$


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



    one side of component



    This is back of it.



    other side of component










    share|improve this question











    $endgroup$














      8












      8








      8





      $begingroup$


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



      one side of component



      This is back of it.



      other side of component










      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






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Jan 15 at 4:00









      SamGibson

      11k41537




      11k41537










      asked Jan 15 at 3:52









      JtlJtl

      12619




      12619




















          3 Answers
          3






          active

          oldest

          votes


















          23












          $begingroup$

          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
            Jan 15 at 4:58






          • 5




            $begingroup$
            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
            Jan 15 at 5:00







          • 1




            $begingroup$
            That would explain what looks like a bubble in there.
            $endgroup$
            – Mazura
            Jan 15 at 14:14






          • 15




            $begingroup$
            Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C
            $endgroup$
            – rackandboneman
            Jan 15 at 15:04






          • 1




            $begingroup$
            Follow rackandboneman's advice "Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C" Judging by that solder job it appears to have been replaced before.
            $endgroup$
            – cardstroker
            Jan 15 at 16:37


















          8












          $begingroup$

          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
            Jan 15 at 6:21










          • $begingroup$
            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
            Jan 15 at 6:31










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            Jan 15 at 6:36


















          5












          $begingroup$

          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









          $endgroup$








          • 3




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            Jan 15 at 4:28










          Your Answer





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          3 Answers
          3






          active

          oldest

          votes








          3 Answers
          3






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          23












          $begingroup$

          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
            Jan 15 at 4:58






          • 5




            $begingroup$
            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
            Jan 15 at 5:00







          • 1




            $begingroup$
            That would explain what looks like a bubble in there.
            $endgroup$
            – Mazura
            Jan 15 at 14:14






          • 15




            $begingroup$
            Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C
            $endgroup$
            – rackandboneman
            Jan 15 at 15:04






          • 1




            $begingroup$
            Follow rackandboneman's advice "Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C" Judging by that solder job it appears to have been replaced before.
            $endgroup$
            – cardstroker
            Jan 15 at 16:37















          23












          $begingroup$

          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
            Jan 15 at 4:58






          • 5




            $begingroup$
            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
            Jan 15 at 5:00







          • 1




            $begingroup$
            That would explain what looks like a bubble in there.
            $endgroup$
            – Mazura
            Jan 15 at 14:14






          • 15




            $begingroup$
            Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C
            $endgroup$
            – rackandboneman
            Jan 15 at 15:04






          • 1




            $begingroup$
            Follow rackandboneman's advice "Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C" Judging by that solder job it appears to have been replaced before.
            $endgroup$
            – cardstroker
            Jan 15 at 16:37













          23












          23








          23





          $begingroup$

          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 Jan 15 at 6:41









          Ale..chenski

          27.1k11865




          27.1k11865










          answered Jan 15 at 4:47









          Spehro PefhanySpehro Pefhany

          206k5156413




          206k5156413











          • $begingroup$
            Why can't I measure conduction in the two legs?
            $endgroup$
            – Jtl
            Jan 15 at 4:58






          • 5




            $begingroup$
            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
            Jan 15 at 5:00







          • 1




            $begingroup$
            That would explain what looks like a bubble in there.
            $endgroup$
            – Mazura
            Jan 15 at 14:14






          • 15




            $begingroup$
            Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C
            $endgroup$
            – rackandboneman
            Jan 15 at 15:04






          • 1




            $begingroup$
            Follow rackandboneman's advice "Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C" Judging by that solder job it appears to have been replaced before.
            $endgroup$
            – cardstroker
            Jan 15 at 16:37
















          • $begingroup$
            Why can't I measure conduction in the two legs?
            $endgroup$
            – Jtl
            Jan 15 at 4:58






          • 5




            $begingroup$
            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
            Jan 15 at 5:00







          • 1




            $begingroup$
            That would explain what looks like a bubble in there.
            $endgroup$
            – Mazura
            Jan 15 at 14:14






          • 15




            $begingroup$
            Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C
            $endgroup$
            – rackandboneman
            Jan 15 at 15:04






          • 1




            $begingroup$
            Follow rackandboneman's advice "Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C" Judging by that solder job it appears to have been replaced before.
            $endgroup$
            – cardstroker
            Jan 15 at 16:37















          $begingroup$
          Why can't I measure conduction in the two legs?
          $endgroup$
          – Jtl
          Jan 15 at 4:58




          $begingroup$
          Why can't I measure conduction in the two legs?
          $endgroup$
          – Jtl
          Jan 15 at 4:58




          5




          5




          $begingroup$
          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
          Jan 15 at 5:00





          $begingroup$
          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
          Jan 15 at 5:00





          1




          1




          $begingroup$
          That would explain what looks like a bubble in there.
          $endgroup$
          – Mazura
          Jan 15 at 14:14




          $begingroup$
          That would explain what looks like a bubble in there.
          $endgroup$
          – Mazura
          Jan 15 at 14:14




          15




          15




          $begingroup$
          Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C
          $endgroup$
          – rackandboneman
          Jan 15 at 15:04




          $begingroup$
          Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C
          $endgroup$
          – rackandboneman
          Jan 15 at 15:04




          1




          1




          $begingroup$
          Follow rackandboneman's advice "Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C" Judging by that solder job it appears to have been replaced before.
          $endgroup$
          – cardstroker
          Jan 15 at 16:37




          $begingroup$
          Follow rackandboneman's advice "Before replacing it, consider looking for the reason why a device that is supposed never to go over 120°C, but needs costly measures to be really, really kept from going over 120°C, went over 120°C" Judging by that solder job it appears to have been replaced before.
          $endgroup$
          – cardstroker
          Jan 15 at 16:37













          8












          $begingroup$

          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
            Jan 15 at 6:21










          • $begingroup$
            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
            Jan 15 at 6:31










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            Jan 15 at 6:36















          8












          $begingroup$

          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
            Jan 15 at 6:21










          • $begingroup$
            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
            Jan 15 at 6:31










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            Jan 15 at 6:36













          8












          8








          8





          $begingroup$

          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 Jan 15 at 6:16









          ElectronElectron

          1,694316




          1,694316











          • $begingroup$
            If more than 1A passes through it. It can open too or only from temperature?
            $endgroup$
            – Jtl
            Jan 15 at 6:21










          • $begingroup$
            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
            Jan 15 at 6:31










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            Jan 15 at 6:36
















          • $begingroup$
            If more than 1A passes through it. It can open too or only from temperature?
            $endgroup$
            – Jtl
            Jan 15 at 6:21










          • $begingroup$
            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
            Jan 15 at 6:31










          • $begingroup$
            Its already burned out. these are single time operation devices. yeh may be.
            $endgroup$
            – Electron
            Jan 15 at 6:36















          $begingroup$
          If more than 1A passes through it. It can open too or only from temperature?
          $endgroup$
          – Jtl
          Jan 15 at 6:21




          $begingroup$
          If more than 1A passes through it. It can open too or only from temperature?
          $endgroup$
          – Jtl
          Jan 15 at 6:21












          $begingroup$
          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
          Jan 15 at 6:31




          $begingroup$
          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
          Jan 15 at 6:31












          $begingroup$
          Its already burned out. these are single time operation devices. yeh may be.
          $endgroup$
          – Electron
          Jan 15 at 6:36




          $begingroup$
          Its already burned out. these are single time operation devices. yeh may be.
          $endgroup$
          – Electron
          Jan 15 at 6:36











          5












          $begingroup$

          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









          $endgroup$








          • 3




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            Jan 15 at 4:28















          5












          $begingroup$

          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









          $endgroup$








          • 3




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            Jan 15 at 4:28













          5












          5








          5





          $begingroup$

          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 Jan 15 at 3:56









          Sunnyskyguy EE75Sunnyskyguy EE75

          65.4k22295




          65.4k22295







          • 3




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            Jan 15 at 4:28












          • 3




            $begingroup$
            Seems to be a thermofuse to me. No current noted, but 125°C.
            $endgroup$
            – Janka
            Jan 15 at 4:28







          3




          3




          $begingroup$
          Seems to be a thermofuse to me. No current noted, but 125°C.
          $endgroup$
          – Janka
          Jan 15 at 4:28




          $begingroup$
          Seems to be a thermofuse to me. No current noted, but 125°C.
          $endgroup$
          – Janka
          Jan 15 at 4:28

















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