Friday 7 February 2014

switching - ultrafast catch diode for relay


Is there any reason to not use a UF2008 as catch diode on a DC relay, solenoid, or electromagnet? IN4001 costs $0.07 and UF2008 costs $0.03 and seems to be better suited in all ways


schematic



simulate this circuit – Schematic created using CircuitLab



Answer



Either diode is fine in this application as long as the relay coil current is less than 2 amps.


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