T: Enameled wire heating resistant temperature
Looking below table to see the Amper allowed to pass, when using the Enameled wire at Inductor wiring, The Delta is recommended to be 40C. the temperature rising is linked to the inductance decreased.
For example, a choke inductor used 0.35mm dia Enameled wire，
Y axis, look up the delta:40C(small letter under), you will the see the rating current is 1.4563A ca.