2SA1725 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 180
• 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 transistor can have a current gain of 50 to 180. The gain of the 2SA1725-O will be in the range from 50 to 100, 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 might only be marked "A1725".The complementary NPN transistor to the 2SA1725 is the 2SC4511.The BDP952 (SOT-223) is the SMD version of the 2SA1725 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1725 with the 2SA1010, 2SA1726, 2SA771, 2SB633, 2SB708, BD244B, BD244C, BD538, BD800, BD802, BD810, BDT84, BDT84F, BDT86, BDT86F, BDT88, BDT88F, BDT94, BDT94F, BDT96, BDT96F, BDX78, KSA1010, KSB708, MJE15029, MJE15029G, MJE15031, MJE15031G, MJF15031 or MJF15031G.