Converter In-Rush Thermistors etc, UPDATE -4

BFL13 wrote:

ken white wrote:

BFL13 wrote:
How about this sort of looking one, under the big heat sink overhang on the right by the fan, marked, "D25XB 60 B 7508"

https://www.google.com/search?q=diode+bridge&rlz=1C1CHFX_enUS511US511&espv=210&es_sm=122&tbm=isch&tbo=u&source=univ&sa=X&ei=8TeZUtegG9XboASskYGQDg&ved=0CFQQsAQ&biw=1920&bih=950&dpr=1#facrc=_&imgdii=_&imgrc=1_v16p2X8sJMRM%3A%3B9h-9s0kAu824YM%3Bhttp%253A%252F%252Fi00.i.aliimg.com%252Fphoto%252Fv15%252F902863610%252F10A_15A_50_1000V_GBU_diode_bridge.jpg_350x350.jpg%3Bhttp%253A%252F%252Fwww.alibaba.com%252Fproduct-gs%252F902863610%252F10A_15A_50_1000V_GBU_diode.html%3B329%3B350

That is a pretty durable device, your other part.

For a 25 amp part, it looks like it can handle about 50 amps for 100 cycles and I would probably stick with 50 amps as a conservative number.

Have fun...

OK so on page 4 here they say to go by the diode bridge, so what do we get from doing that with this diode bridge?

Thanks--you are amazingly patient! :)

http://dkc1.digikey.com/us/en/tod/Ametherm/Choosing_NTC_Thermistor_NoAudio/Choosing_NTC_Thermistor_NoAudio.html

Using page 4, and a 50 amp limit you would need a 3.4 ohm value.

If you went with a 25 amp limit, very conservative, a 6.8 ohm value would be used.

Now, there are other possible current limiting values too that are difficult to estimate without a schematic and parts list.

Have fun, I am done for tonight, we are going out to dinner...