yousufrafi Posted October 13, 2006 Report Share Posted October 13, 2006 Can anyone please give me the Datasheet of BELL 187 npn transistor. Quote Link to comment Share on other sites More sharing options...
yousufrafi Posted October 14, 2006 Author Report Share Posted October 14, 2006 Can anyone please tell me the replacement of BELL 187 npn transistor. Quote Link to comment Share on other sites More sharing options...
audioguru Posted October 14, 2006 Report Share Posted October 14, 2006 Don't you mean a BEL187 and not a BELL 187?Long ago when transistors were new and expensive, they made a BEL187 with high gain and a high max current of 1A. Now transistors are cheap so they are made with high gain but low current and with high current but low gain and you simply use both together. Quote Link to comment Share on other sites More sharing options...
mvs sarma Posted October 14, 2006 Report Share Posted October 14, 2006 audioguruBEL187 is a low voltage power NPN tranasister manufactured by Bharat electronics Limited (BEL) in India. you may compare it as a silicon equivalent of AC187 made earlier. it is to92 package but with small heat sink.this device with its complimetary BEL 188(PNP) is used as a power out put of audio in portable radio and other applications.perhaps sl100 with complimentary sk100 can be used, the space to be bargained.sarma Quote Link to comment Share on other sites More sharing options...
audioguru Posted October 14, 2006 Report Share Posted October 14, 2006 Thanks, Sarma.I don't know about transistors made in India.I still have some germanium AC187 and AC188 Philips transistors. Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted October 14, 2006 Report Share Posted October 14, 2006 Here is all I have.BEL187 npn Transistorhttp://www.bel-india.com/BELWebNew/UploadedFiles/Products/Plastic_package.pdf#search='BEL187%20npn'http://www.datasheets.org.uk/datasheet.php?article=963356http://www.datasheets.org.uk/specsheet.php?part=BEL187NPN Driver/Output Transistor Plastic PackageTYPE BEL187 Quote Link to comment Share on other sites More sharing options...
yousufrafi Posted October 15, 2006 Author Report Share Posted October 15, 2006 Thankyou very much for your answers.I am using BELL187 in a power supply,so what replacement should i use for this circuit? Quote Link to comment Share on other sites More sharing options...
yousufrafi Posted October 15, 2006 Author Report Share Posted October 15, 2006 Thankyou very very much hotwaterwizard. Quote Link to comment Share on other sites More sharing options...
ante Posted October 15, 2006 Report Share Posted October 15, 2006 The current limit circuit will work with almost any NPN transistor. Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted October 15, 2006 Report Share Posted October 15, 2006 More Circuits herehttp://www.electronicsforu.com/efylinux/circuit/feb2003/Musical%20Touch%20Bell.pdfhttp://www.electronicsforu.com/efylinux/circuit/feb2003/Automatic%20Heat%20Detector.pdfhttp://www.datasheetarchive.com/search.php?q=BEL187 Quote Link to comment Share on other sites More sharing options...
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