A mJ W W °C ▪THERMAL RESISTANCE RATINGS THERMAL RESISTANCE SYMBOL Junction-to-Case RθJC Junction-to-Ambient3 t≦10s RθJA Steady-State RθJA 1Pulse width limited by maximum junction temperature. 2Duty cycle < 1% 390°C / W when mounted on a 1 in2 pad of 2 oz copper. 4Guarantee by Engineeri.