So, I may be overthinking a problem (like I usually do) but I figure I should ask.
For 30 years I have have been building control panel .... almost always 24 vdc control power (ever since I saw a guy doing some really stupid things with a 120 vac float switch).
Anyway, I always put a flyback diode across my relays and contactors. Simple enough. I never gave much thought as to what size .. bigger the better I ways say We are only talking a few pennies difference from one to anther.
I am just putting together the parts list for a panel ... small plc, touch screen, 12 relays, 12 contactors, ...
I just looked at what I used last time (last month, and the month before and .... I bought 100 last year) ..... 1N5408
So, 1N5408 ... 3 amp, 1 KV, seems like good fit.
Then I started reading on the web ... WOW ... calculations ... questions of speed ... should you even do it at all (welding of contacts ... slow release ) ....
Way more then I wanted to get into.
Most people mention a 1N4007 ... 1A, 1KV
Is the 1N5408 just a larger version of a 1N4007 or is there some major change from 1N5XXX to 1N4XXX ?
For all I know, any diode will work for this purpose but I thought I should check with you guys.
Thanks!
Mike
For 30 years I have have been building control panel .... almost always 24 vdc control power (ever since I saw a guy doing some really stupid things with a 120 vac float switch).
Anyway, I always put a flyback diode across my relays and contactors. Simple enough. I never gave much thought as to what size .. bigger the better I ways say We are only talking a few pennies difference from one to anther.
I am just putting together the parts list for a panel ... small plc, touch screen, 12 relays, 12 contactors, ...
I just looked at what I used last time (last month, and the month before and .... I bought 100 last year) ..... 1N5408
So, 1N5408 ... 3 amp, 1 KV, seems like good fit.
Then I started reading on the web ... WOW ... calculations ... questions of speed ... should you even do it at all (welding of contacts ... slow release ) ....
Way more then I wanted to get into.
Most people mention a 1N4007 ... 1A, 1KV
Is the 1N5408 just a larger version of a 1N4007 or is there some major change from 1N5XXX to 1N4XXX ?
For all I know, any diode will work for this purpose but I thought I should check with you guys.
Thanks!
Mike