2SA1725-O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -6 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 50 to 100
• Transition Frequency, min: 20 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.The 2SA1725-O transistor can have a current gain of 50 to 100. The gain of the 2SA1725 will be in the range from 50 to 180, for the 2SA1725-P it will be in the range from 70 to 140, for the 2SA1725-Y it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SA1725-O might only be marked "A1725-O".The complementary NPN transistor to the 2SA1725-O is the 2SC4511-O.The BDP952 (SOT-223) is the SMD version of the 2SA1725-O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1725-O with the 2N6134, 2N6491, 2N6491G, 2SA1010, 2SA1726, 2SA1726-O, 2SA771, 2SB633, 2SB708, BD244B, BD244C, BD538, BD538K, BD710, BD712, BD744B, BD744C, BD800, BD802, BD810, BD910, BD912, BDT84, BDT84F, BDT86, BDT86F, BDT88, BDT88F, BDT94, BDT94F, BDT96, BDT96F, BDX78, KSA1010, KSB708, MJE15029, MJE15029G, MJE15031, MJE15031G, MJE5170, MJE5171, MJE5172, MJF15031, MJF15031G, MJF2955 or MJF2955G.