what is difference between holding current and latching current?

what is difference between holding current and latching current?

LATCHING CURRENT is another name for gate trigger current -- it's a measure of
the minimum current you have to apply to the gate of an SCR to be guaranteed it
will turn on (given that there's a minimum voltage between anode and cathode).


Holding current is the specified minimum current that must be flowing from
anode to cathode (with no gate current) and still be guaranteed that the SCR
will not turn off.

As an example, the latching (gate trigger) current for a 2N5062 (logic level
SCR in TO-92 pkg) is 350 uA over the entire temp range, and the holding current
is10 mA over temp.