2SB434 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 25 W
• DC Current Gain (h_fe): 40 to 240
• Transition Frequency, min: 3 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SB434 transistor can have a current gain of 40 to 240. The gain of the 2SB434O will be in the range from 70 to 140, for the 2SB434R it will be in the range from 40 to 80, for the 2SB434Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SB434 might only be marked "B434".The complementary NPN transistor to the 2SB434 is the 2SD234.You can replace the 2SB434 with the 2SA1262, 2SA1488, 2SA1488A, 2SA489, 2SA614, 2SA770, 2SA771, 2SB1016, 2SB1017, 2SB1367, 2SB1368, 2SB507, 2SB595, 2SB596, 2SB633, 2SB761, 2SB761A, 2SB762, 2SB762A, 2SB942, 2SB942A, 2SB995, 2SB996, BD204, BD242A, BD242B, BD242C, BD244A, BD244B, BD244C, BD304, BD536, BD538, BD540A, BD540B, BD540C, BD798, BD800, BD802, BD808, BD810, BD936, BD936F, BD938, BD938F, BD940, BD940F, BD950, BD952, BD954, BDT82, BDT82F, BDT84, BDT84F, BDT86, BDT86F, BDX78, D44C10, D44C11, D44C12, D44C7, D44C8, D44C9, D45C10, D45C11, D45C12, D45C7, D45C8, D45C9, KSA614, KSB1017, KSB596, KTB1367 or KTB1368.