2SB870-Q Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -130 V
• Emitter-Base Voltage, max: -7 V
• Collector Current − Continuous, max: -7 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 90 to 180
• Transition Frequency, min: 30 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 2SB870-Q transistor can have a current gain of 90 to 180. The gain of the 2SB870 will be in the range from 60 to 260, for the 2SB870-P it will be in the range from 130 to 260, for the 2SB870-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SB870-Q might only be marked "B870-Q".The complementary NPN transistor to the 2SB870-Q is the 2SD866-Q.You can replace the 2SB870-Q with the 2SA1010, 2SA1077, 2SA1329, 2SA1452, 2SA1452A, 2SB1018, 2SB1018A, 2SB708, 2SB946, 2SB946-Q, 2SB992, BD538, BD544B, BD544C, BD546B, BD546C, BD800, BD802, BD810, BDT84, BDT84F, BDT86, BDT86F, BDT88, BDT88F, BDT94, BDT94F, BDT96, BDT96F, BDX78, D45H11, D45H11FP, KSA1010, KSB708, MJE15029, MJE15029G, MJE15031, MJE15031G, MJF15031 or MJF15031G.