In Reply to: RE: Resistor dissipation Question posted by timp on September 15, 2012 at 20:58:19:
Power equals Voltage times Current (in Amperes), Ohm's Law.I always make sure there is 2 to 1, rated versus dissipated, and I am MOST HAPPY when it is 4 to 1, rated versus dissipated, for long term reliability and fail-safe operation.
I ventilate my chassis on DIY builds, above and below power resistor bodies that dissipate a lot. I drill 3/8ths inch vent holes on 9/16ths inch centers, three in a row, for Mills MR-12 power resistors, looks "uptown".
Jeff Medwin
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Resistor dissipation Question - drlowmu 09/15/1221:08:11 09/15/12 (5)
- Just for the record... - Steve O 21:59:07 09/15/12 (3)
- RE: Just for the record... - raq 05:31:14 09/19/12 (0)
- Then you'll need a "good sleep factor"... - wheezer 04:45:47 09/16/12 (0)
- RE: Just for the record... - drlowmu 22:13:37 09/15/12 (0)
- RE: Resistor dissipation Question - timp 21:10:14 09/15/12 (0)