Mar 10, 2012 #1 saumya_85 Advanced Member level 4 Joined Mar 18, 2009 Messages 107 Helped 6 Reputation 12 Reaction score 5 Trophy points 1,298 Location INDIA Activity points 1,948 1. Without putting NTC: while measuring inrush current shows 5.3A 2. Also after NTC mount on PCB : inrush current (5.3A) as before. There is no effect of NTC after mounting into our board. NTC is connected in series in between AC mains and Bridge rectifier. Could anyone suggest how to calculate value for the NTC and How NTC affects for inrush current.
1. Without putting NTC: while measuring inrush current shows 5.3A 2. Also after NTC mount on PCB : inrush current (5.3A) as before. There is no effect of NTC after mounting into our board. NTC is connected in series in between AC mains and Bridge rectifier. Could anyone suggest how to calculate value for the NTC and How NTC affects for inrush current.
Mar 10, 2012 #2 kak111 Advanced Member level 4 Joined Mar 30, 2011 Messages 1,365 Helped 933 Reputation 1,868 Reaction score 907 Trophy points 1,413 Location Finland Activity points 10,827 These should help you.......... Inrush Current Limiters Application notes https://www.epcos.com/web/generator...operty=Data__en.pdf;/PDF_Applicationnotes.pdf Inrush Current Limiters - Power Thermistors - Home https://www.ametherm.com/inrush-current/ How To Stop Inrush Current Use an NTC Power Thermistor Inrush Current https://www.ametherm.com/inrush-current/how-to-stop-inrush-current.html Transformer Inrush Current Use an Inrush Current Limiter https://www.ametherm.com/inrush-current/transformer-inrush-current.html
These should help you.......... Inrush Current Limiters Application notes https://www.epcos.com/web/generator...operty=Data__en.pdf;/PDF_Applicationnotes.pdf Inrush Current Limiters - Power Thermistors - Home https://www.ametherm.com/inrush-current/ How To Stop Inrush Current Use an NTC Power Thermistor Inrush Current https://www.ametherm.com/inrush-current/how-to-stop-inrush-current.html Transformer Inrush Current Use an Inrush Current Limiter https://www.ametherm.com/inrush-current/transformer-inrush-current.html