BC141 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 3.7 W
• DC Current Gain (h_fe): 40 to 250
• Transition Frequency, min: 50 MHz
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the BC141 is the BC161.You can replace the BC141 with the 2N5321 or BC441.