See datasheet for JANSR2N2218 & JANSR2N2219 LEVELS. Operating & Storage Junction Temp. Range. Max. (3) Pulse Test: Pulse Width = 300μs, Duty Cycle ≤ 2.0%. Dimensions are in inches. Millimeters are given for general information only. Beyond r (radius) maximum, TW shall be held for a minimum length of .011 (0.28 mm).