boschman2 Posted September 19, 2006 Report Posted September 19, 2006 can someone tell me what part this is ? I need to purchase more of these or an equivalent part. This part is probably about 20 years old so I'm not sure if its even available anymore. It came from a circuit board in an instrument cluster out of a BMW car. I assume the 100ns means 100 nanoseconds ? Quote
audioguru Posted September 19, 2006 Report Posted September 19, 2006 That's nice. An electronic component that stores time. I wonder if it is time that has past or if it is time in the future.If I connect a bunch in parallel then I could see which horse will win in a horse race and I could bet on it in advance and win! Quote
ante Posted September 20, 2006 Report Posted September 20, 2006 Hi boschman,Welcome to out forum.This is most likely a capacitor 100nF (0.1uF) and it has nothing to do with horseracing! ;) Quote
hotwaterwizard Posted September 20, 2006 Report Posted September 20, 2006 I had something like this on a crossover for tweeter protection. It was a circuit breaker that would open if too much power was sent to the tweeter. It reset it's self when you lowered the volume. My guess is a fast acting micro fuse and the time stamp tells how fast it acts. Just a guess. Quote
hotwaterwizard Posted September 20, 2006 Report Posted September 20, 2006 I did find this.http://www.fastcomtec.de/fwww/datashee/amp/cr-110.pdfhttp://www.fastcomtec.de/fwww/cremat.htm Quote
boschman2 Posted September 21, 2006 Author Report Posted September 21, 2006 HotwaterwizardWhen you said you had a similar component on a crossover for a tweeter, are you referring to that small, beige colored, 2 prong part that is on the circuit board in the pic you included in your post ??thanks in advance. Quote
hotwaterwizard Posted September 21, 2006 Report Posted September 21, 2006 Yes that is a self reseting circuit breaker of a sort. Quote
audioguru Posted September 21, 2006 Report Posted September 21, 2006 Yes that is a self reseting circuit breaker of a sort.Is it called "a Polyfuse"? Quote
boschman2 Posted September 21, 2006 Author Report Posted September 21, 2006 Audioguru maybe on to something with his "polyfuse" hypothesis because I found this http://www.electronicsforu.com/electronicsforu/Articles/ad.asp?url=/EFYLinux/efyhome/cover/sep2004/PolyFuse.pdf&title=PolyFuse:%20A%20New%20Standard%20For%20Circuit%20Protection.I wonder if I could just bypass this little part all together ?, just put a bridge in its place ? Quote
hotwaterwizard Posted September 21, 2006 Report Posted September 21, 2006 What if it is a Time Delay Thermistor?therm Quote
boschman2 Posted September 22, 2006 Author Report Posted September 22, 2006 I dont know Hotwaterwizard, you might be right too. I didnt think this part would be this difficult to identify. I appreciate everyones responses so far.Any thoughts on whether or not I could just leave the part off and use a bridge instead ? I guess thats hard to answer if we dont even know what the part is, huh ? Quote
hotwaterwizard Posted September 22, 2006 Report Posted September 22, 2006 can someone tell me what part this is ? I need to purchase more of these or an equivalent part. This part is probably about 20 years old so I'm not sure if its even available anymore. It came from a circuit board in an instrument cluster out of a BMW car. I assume the 100ns means 100 nanoseconds ?What Year and Model is the BMW?1986?http://www.bmwgsclub.nl/artikelen.htm Quote
ante Posted September 22, 2006 Report Posted September 22, 2006 Hi boschman,Why did you remove it form your cars instrument cluster? Do you suspect there is something wrong with it? What are the symptoms?I do not recommend replacing it with a jumper, this can turn out to be a very expensive test!I still believe it is a capacitor, have you measured it? Quote
hotwaterwizard Posted September 22, 2006 Report Posted September 22, 2006 This may help decypher the code.http://www.electronics-lab.com/forum/index.php?topic=1523.0 Quote
boschman2 Posted September 30, 2006 Author Report Posted September 30, 2006 I was having problems with the cars instrument cluster. The batteries inside the cluster were dead so I was rebuilding the circuit board with new batts and new capacitors and wanted to replace as many parts as I could while I had the cluster apart since its 20 years old. Thats when I tried to identify the part you see in the pic in my initial post.I'd still like to figure out exactly what that little sucker is. When i test it with the ohm meter i get 1.2M ohms. Quote
mvs sarma Posted October 1, 2006 Report Posted October 1, 2006 THE PART COULD BE A LEAKED CAPACITOR OF 100n OR IT COULD AT THE WORST BE A PARALLEL R-C WITH 1M2 AS RESISTOR AND WITH TIME CONSTANT OF 100nSSARMA Quote
ante Posted October 4, 2006 Report Posted October 4, 2006 I suppose you don’t have any circuit diagram or a picture to show where this part is located relative other things in the circuit?! That might give some ideas of what this part is doing in its environment. Quote
boschman2 Posted October 8, 2006 Author Report Posted October 8, 2006 AN920: How sure are you that the part is a 100nF cap ??Ante: Yeah, I could get a picture of the entire circuit board. The board is only about 5 inches square and it has a total of 5 of these mystery parts on it. I'll try and find I pic to upload and then I'll post the pic. Quote
AN920 Posted October 8, 2006 Report Posted October 8, 2006 I have seen similar parts with the typical blue color in the past by Siemens. Also BMW - Germany- Siemens, make sense? Quote
ante Posted October 9, 2006 Report Posted October 9, 2006 As I mentioned before; I believe it’s a capacitor too! Yes it makes sense. ;) Quote
boschman2 Posted October 9, 2006 Author Report Posted October 9, 2006 Also BMW - Germany- Siemens, make sense? Yeah I thought this too because the circuit board is made by VDO which is a Siemens company. I dont know if Siemens owned VDO at the time the board was made which was circa 1985 but either way, they're both german.So even though the part has "100nS" on it you still think it means "100nF" ? Thats the only thing that makes me hesitate. I wonder why they just didnt put "100nF" on it instead of the "nS" Quote
boschman2 Posted October 9, 2006 Author Report Posted October 9, 2006 ANTE, here's a pic of the whole board. You can see 3 of the blue mystery parts in this pic but there are actually 5. The other 2 are hidden behind that ribbon cable. Quote
hotwaterwizard Posted October 10, 2006 Report Posted October 10, 2006 Is there any writing on the board near these items? Quote
boschman2 Posted October 10, 2006 Author Report Posted October 10, 2006 hotwaterwizard,No, no writing at all. The board is pretty blank as you can see by the pic. Quote
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