BC140 NPN Power Switching Transistor 40V 1A TO -39 Metal Package

BC140 NPN Power Switching Transistor 40V 1A TO -39 Metal Package

The BC140 is a medium-power NPN transistor designed for switching and low-frequency amplification applications.
With a collector-emitter voltage of 40V and a collector current of up to 1A, it provides reliable switching performance, good current handling, and excellent thermal stability.
Encased in a TO-39 metal package, the BC140 offers robust mechanical protection, efficient heat dissipation, and long-term reliability, making it ideal for audio amplifiers, driver stages, and general-purpose power switching circuits.

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Features

• NPN Power Transistor – suitable for low-frequency and switching applications
• Voltage Rating: 40V (Collector-Emitter)
• Current Rating: 1A continuous collector current
• Power Dissipation: High efficiency with robust performance
• TO-39 Metal Package: Ensures excellent heat dissipation and mechanical strength
• High Gain (hFE): Provides efficient signal amplification
• Reliable and Rugged Design: Stable under thermal and electrical stress
• RoHS Compliant: Lead-free and environmentally friendly

Applications

• Power switching circuits – medium current control applications
• Audio amplifier driver stages – stable and clean signal amplification
• Relay and solenoid drivers – efficient current handling
• Voltage and current regulation circuits – linear performance
• Signal processing and control systems – low-frequency applications
• Industrial and instrumentation equipment – robust and reliable operation
• General-purpose medium-power circuits – educational, hobby, and professional designs

bc140-transistor-datasheet