2N4250 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -40 V
• Collector-Base Voltage, max: -40 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.05 A
• Collector Dissipation: 0.2 W
• DC Current Gain (h_fe): 250 to 700
• Transition Frequency, min: 50 MHz
• Noise Figure, max: 2 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-106

Here is an image showing the pin diagram of this transistor.The KST5087 (SOT-23) and MMBT5087 (SOT-23) is the SMD version of the 2N4250 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The MPS4250, PN4250 is the TO-92 version of the 2N4250.You can replace the 2N4250 with the 2N4248 or 2N4250A.