SEMICONDUCTOR 74.0 (2.91) DIA. Max. l 1450PT Series RRooHHSS D TYPE 20 3.5 ( 0.14 ) 47.0 (1.85) DIA. Max. DIA. 27.6 ( 1.09 ) Max. All dimensions in millimeters ( inches ) Instantaneous on-state voltage , V Max. On-state dissipation , W SEMICONDUCTOR Fig. 1 Peak on-state voltage Vs. Peak on-state Current 3 2.5 2 Tj = 125 C 1.5 1 0.5 100 1000 10000 Instantaneous on-state current , A Transient thermal impedance , C / W 1450PT Series RRooHHSS Fig. 2 Max. Junction to heatsink therm.