2SB688 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: -8 A
• Collector Dissipation: 80 W
• DC Current Gain (h_fe): 55 to 160
• Transition Frequency, min: 12 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 2SB688 transistor can have a current gain of 55 to 160. The gain of the 2SB688O will be in the range from 80 to 160, for the 2SB688R it will be in the range from 55 to 110.Sometimes the "2S" prefix is not marked on the package - the 2SB688 might only be marked "B688".The complementary NPN transistor to the 2SB688 is the 2SD712.You can replace the 2SB688 with the 2SA1093, 2SA1104, 2SA1105, 2SA1106, 2SA1146, 2SA1186, 2SA1264, 2SA1264-O, 2SA1264N, 2SA1264N-O, 2SA1265, 2SA1265-O, 2SA1301, 2SA1302, 2SA1303, 2SA1386, 2SA1386A, 2SA1386A-O, 2SA1386A-P, 2SA1386A-Y, 2SA1490, 2SA1491, 2SA1492, 2SA1516, 2SA1694, 2SA1695, 2SA1804, 2SA1805, 2SA1940, 2SA1941, 2SA1942, 2SA1943, 2SA1986, 2SA2120, 2SA2121, 2SA2151, 2SA2151A, 2SA2151A-O, 2SA2151A-P, 2SA2151A-Y, 2SB1429, 2SB778, 2SB863, FJA4210, KTA1943, KTA1943A, KTA1962, KTA1962A, KTB688, KTB688B, KTB778, MJW1302A, MJW1302AG or NTE2329.