Subject: | |
From: | |
Reply To: | |
Date: | Thu, 2 Dec 2010 14:50:55 -0600 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Should be 2.3 W for 1 S, having trouble reading log - log graphs -Blair
On Thu, 2 Dec 2010 14:38:41 -0600, Blair Hogg <[log in to unmask]>
wrote:
>This is a little off the normal Technet topic genre, but I was wondering if
>anyone out there may have some data on how long a resistor can withstand
>overcurrent before it changes resistance / fuses open? I'm taling about a
>standard 0805 carbon film resistor, for example 100 ohms:
>
>at 1 mA it drops 100 mV and dissipates 100 uW, no big deal for a 125 mW
>device
>
>at 10 mA it drops 1 V and dissipates 10 mW, still no big deal
>
>at 100 mA it drops 10 V and dissipates 1 W, until the resistance increases
>dramatically
>
>How much of a time duration can the device withstand at 100 mA? Is there a
>correlation between overload and time?
>
>The graph in http://www.koaspeer.com/pdfs/Thick_Film_Pulse_Limitation.pdf
>seems to indicate that an 0805 (2A on the graph) can dissipate 1.5 W for 1
>second. Does this make sense?
>
>Thanks,
>
>Blair
>
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
|
|