2SB778 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -120 V
• Collector-Base Voltage, max: -120 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -10 A
• Collector Dissipation: 80 W
• DC Current Gain (h_fe): 55 to 160
• Transition Frequency, min: 10 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3P

Here is an image showing the pin diagram of this transistor.The 2SB778 transistor can have a current gain of 55 to 160. The gain of the 2SB778-O will be in the range from 80 to 160, for the 2SB778-R it will be in the range from 55 to 110.Sometimes the "2S" prefix is not marked on the package - the 2SB778 might only be marked "B778".The complementary NPN transistor to the 2SB778 is the 2SD998.You can replace the 2SB778 with the 2SA1106, 2SA1146, 2SA1186, 2SA1265, 2SA1265-O, 2SA1301, 2SA1302, 2SA1303, 2SA1386, 2SA1386A, 2SA1386A-O, 2SA1386A-P, 2SA1386A-Y, 2SA1491, 2SA1492, 2SA1516, 2SA1695, 2SA1805, 2SA1941, 2SA1942, 2SA1943, 2SA1986, 2SA2120, 2SA2121, 2SA2151, 2SA2151A, 2SA2151A-O, 2SA2151A-P, 2SA2151A-Y, 2SB1429, 2SB863, FJA4210, KTA1943, KTA1943A, KTA1962, KTA1962A, KTB688, KTB688B, KTB778, MJW1302A, MJW1302AG or NTE2329.