BDV91 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 10 A
• Collector Dissipation: 100 W
• DC Current Gain (h_fe): 20
• Transition Frequency, min: 4 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-3P

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the BDV91 is the BDV92.You can replace the BDV91 with the 2SC3256, 2SC3256-Q, 2SC3256-R, 2SC3256-S, 2SD1193, 2SD1197, 2SD1840, 2SD1840-P, 2SD1840-Q, 2SD1841, 2SD1841-P, 2SD1841-Q, 2SD1842, 2SD1842-P, 2SD1842-Q, 2SD998, 2SD998-O, 2SD998-R, BD245A, BD245B, BD245C, BD249A, BD249B, BD249C, BD745A, BD745B, BD745C, BDV65B, BDV65BG, BDV67, BDV67A, BDV67B, BDV67C, BDV93, BDV95, BDW83A, BDW83B, BDW83C, BDW83D, KTD718, KTD718-O, KTD718-R, KTD718B, KTD718B-O, KTD718B-R, KTD998, KTD998-O, KTD998-R, MJH6282, MJH6283, MJH6284, MJH6284G, NTE390, TIP140, TIP140G, TIP141, TIP141G, TIP142, TIP142G, TIP3055, TIP3055G, TIP33A, TIP33B or TIP33C.