2SB598 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -25 V
• Collector-Base Voltage, max: -25 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 0.6 W
• DC Current Gain (h_fe): 60 to 560
• Transition Frequency, min: 180 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SB598 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads.
Here is an image showing the pin diagram of this transistor.The 2SB598 transistor can have a current gain of 60 to 560. The gain of the 2SB598-D will be in the range from 60 to 120, for the 2SB598-E it will be in the range from 100 to 200, for the 2SB598-F it will be in the range from 160 to 320, for the 2SB598-G it will be in the range from 280 to 560.Sometimes the "2S" prefix is not marked on the package - the 2SB598 might only be marked "B598".The complementary NPN transistor to the 2SB598 is the 2SD545.You can replace the 2SB598 with the 2N4954.