PE NUMBER Power dissipation at Tamb = 75 ºC Non repetitive peak zener dissipation (t = 8.3 ms) Operatin Temperature Range Storage Temperature Range Max. forward voltage drop at IF = 3.0 A Max. thermal resistance at 10 mm. Lead length VALUE 5.0 180 -55 to +175 -55 to +175 1.2 20 UNIT W W ºC ºC V ºC.