BC441-6 Bipolar Transistor

• Type: NPN
• 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 BC441-6 transistor can have a current gain of 115 to 250. The gain of the BC441 will be in the range from 40 to 250, for the BC441-4 it will be in the range from 40 to 70, for the BC441-5 it will be in the range from 60 to 130.The complementary PNP transistor to the BC441-6 is the BC461-6.The FMMT491 (SOT-23), FMMT491Q (SOT-23) and KTC4378 (SOT-89) is the SMD version of the BC441-6 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BC441-6 with the 2N3019, 2N3107, 2N4032, 2N4033, 2N5321, BC141 or BC141-16.