BC140 NPN Metal Transistor 40V 1A TO-39

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BC140 NPN Metal Transistor 40V 1A TO-39 The BC140 is a silicon NPN medium-power bipolar junction transistor designed for general-purpose switching and amplification. Housed in a robust TO-39 metal can package, it offers improved thermal performance and mechanical durability compared to plastic alternatives. With a collector-emitter voltage rating of 40V and a collector current up to 1A, it is suitable for driver stages, power switching, and medium-load control applications. The BC140 is widely used in industrial, automotive, and general electronics projects where higher current handling is required compared to small-signal transistors like BC108. It supports stable gain groups and good switching speed, making it suitable for relay drivers, audio output stages, motor drivers, and power control circuits. Features: Silicon NPN medium-power transistor. TO-39 metal can package. High collector current capability. Suitable for switching and amplification. Good thermal performance. Stable DC current gain groups. Fast switching performance. Durable metal housing. Specifications: Parameter Value Transistor Type: NPN Package: TO-39 Collector-Emitter Voltage (VCEO): 40V Collector-Base Voltage (VCBO): 80V Emitter-Base Voltage (VEBO): 7V Maximum Collector Current (IC): 1A Peak Collector Current (ICM): 1.5A Maximum Base Current: 200mA Total Power Dissipation: 3.7W (Tc ≤ 45°C) Transition Frequency (fT): 50MHz Junction Temperature: 175°C (max) Operating Temperature: -65°C to +150°C Pinout: Pin Number Pin Name 1 Emitter 2 Base 3 Collector Applications: Relay drivers. Medium power switching circuits. Audio amplifier output stages. Motor driver circuits. Power regulation circuits. Industrial control systems. Automotive electronics. Packages: 1x BC140 NPN Metal Transistor 40V 1A TO-39. Documents: BC140 Datasheet.