That is the maximum voltage drop that is necessary to go into current limiting mode. Any lower drop across the diode and it will act more like a resistor than a current source. At 30 volts, anything under around 5 Volts should be fine for that.

Marshall

On 8/31/2013 7:22 PM, Joe Huard wrote:
Hi,
I am lost trying to find a current limiting diode. I went to my local electronics parts store, and he never even heard of them. I found some on Mouser http://ca.mouser.com/Semiconductors/Discrete-Semiconductors/Diodes-Rectifiers/Current-Regulator-Diodes/_/N-ax1ml, but I don't get the "Maximum Limiting Voltage" part. What do I need here? I was going to use 30 V and 1 mA.

Joe H.


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