BC461-6 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -60 V
• Collector-Base Voltage, max: -75 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 115 to 250
• Transition Frequency, min: 50 MHz
• Operating and Storage Junction Temperature Range: -55 to +200 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The BC461-6 transistor can have a current gain of 115 to 250. The gain of the BC461 will be in the range from 40 to 250, for the BC461-4 it will be in the range from 40 to 70, for the BC461-5 it will be in the range from 60 to 130.The complementary NPN transistor to the BC461-6 is the BC441-6.The FMMT591 (SOT-23) and FMMT591Q (SOT-23) is the SMD version of the BC461-6 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BC461-6 with the 2N4405, 2N5323, BC161 or BC161-16.