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Joseph Hebert
11/17/13 04:00
Read: 832 times
Okemah, Ok
United States


 
#190145 - pot limits
Responding to: Raghunathan's previous message
Hi Raghunathan,

You know the maximum current the potentiometer wiper/contacts will have to conduct when set at zero ohms. Hook one up to a power supply and stress test it. Find out how much current it can handle. If you need, I have a 20 A supply I use for plating. Send one and I'll let you know if it melts or lets the smoke out first, and at what current. But in all seriousness, is it really likely that 20 mA will cause it to fail?

Good luck,
Joe

List of 15 messages in thread
TopicAuthorDate
Power rating of potentiometers      Raghunathan      11/14/13 21:24      
   Not the point      Andy Neil      11/15/13 11:47      
      show me such        Jan Waclawek      11/16/13 13:48      
         (was) incorrect      Erik Malund      11/16/13 18:02      
            not your average "pot"      Andy Neil      11/17/13 07:40      
         Specs that are not normally told..      Raghunathan      11/17/13 03:37      
            power      Joseph Hebert      11/17/13 04:10      
            test bench vs field design       Jim Granville      11/17/13 12:13      
         That was kind of my point      Andy Neil      11/17/13 07:50      
   pot limits      Joseph Hebert      11/17/13 04:00      
      While I don't disagree ... there are different failure modes        Richard Erlacher      11/17/13 14:50      
   Bourns says: "yes."        Kai Klaas      11/18/13 16:08      
      Tesla says: no      Jan Waclawek      11/19/13 14:11      
      cermet or wirewound      Jan Waclawek      11/20/13 01:02      
         No big difference, if it all      Kai Klaas      11/23/13 06:10      

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