BD140 Transistor PNP 1.5A 80V
7,33 EGP
High-Voltage BD140 PNP Transistor for Audio and Driver Stages
The BD140 Transistor functions as a highly popular PNP Silicon Bipolar Junction Transistor (BJT) specifically designed for medium-power applications where higher voltage rails are present. As the highest voltage member of the BD136/BD138/BD140 series, it is a definitive choice for engineers designing television vertical deflection circuits, audio drivers, and industrial switches.
Robust 80V Performance and Current Capacity
Specifically, the BD140 handles a collector-emitter voltage ($V_{CEO}$) of up to 80V. This high rating provides an exceptional safety margin for 24V, 36V, and 48V DC power rails, protecting the component from inductive kickback or voltage surges. Furthermore, the device manages a continuous collector current ($I_C$) of up to 1.5A. This capacity allows the device to drive demanding loads such as solenoids, DC motors, and high-power LED arrays with ease. Moreover, its low saturation voltage ensures high energy efficiency by minimizing heat generation during full conduction. Transitioning to the BD140 ensures your power management circuit remains reliable even under high-voltage stress.
Versatile TO-126 Package and Thermal Reliability
Additionally, the BD140 utilizes the industry-standard TO-126 (SOT-32) package style. This design features a convenient central mounting hole, which allows you to attach the transistor directly to a heat sink for improved thermal management. Specifically, when properly cooled, the device can dissipate up to 12.5W of power, far exceeding the 1.25W limit in free air.
Moreover, technicians frequently install the BD140 in the driver stages of high-fidelity audio amplifiers. Specifically, its high transition frequency ($f_T$) of 190 MHz ensures a clean signal response across the audible spectrum. Furthermore, the component is the PNP complement to the BD139 NPN transistor. Using these two together allows for the creation of balanced push-pull amplifier configurations or high-voltage H-bridge controllers. Additionally, its robust construction ensures a long operational life in both consumer electronics and industrial automation.
Verified Data Sheet (Technical Specifications)
| Feature | Specification |
| Transistor Polarity | PNP |
| Collector-Emitter Voltage ($V_{CEO}$) | -80V |
| Collector-Base Voltage ($V_{CBO}$) | -80V |
| Emitter-Base Voltage ($V_{EBO}$) | -5V |
| Collector Current ($I_C$) | -1.5A |
| Peak Collector Current ($I_{CM}$) | -3.0A |
| Total Power Dissipation ($P_{tot}$) | 1.25W (Free Air) / 12.5W (with Heat Sink) |
| DC Current Gain ($h_{FE}$) | 40 to 250 (Class 6, 10, or 16) |
| Transition Frequency ($f_T$) | 190 MHz (Typical) |
| Package Type | TO-126 (SOT-32) |
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