Description
🔹 Overview
The BD140 Transistor is a medium-power PNP silicon transistor built for switching and linear amplifier applications. Its specifications and packaging make it ideal for use in audio stages, driver circuits, and general-purpose electronics. The BD140 complements its NPN counterpart (such as the BD139) in push-pull or complementary amplifier designs.
At Rafiq Electronics, we supply authentic BD140 transistors tested for reliability and consistent performance, so whether you’re making a DIY amplifier or repairing electronic equipment, you can trust this component.
✅ Key Features
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✅ PNP Configuration: Ideal for PNP side of complementary transistor pairs.
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✅ Collector Current up to 1.5 A (-1.5 A for PNP): Suitable for moderate output applications.
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✅ Collector-Emitter Voltage (Vce) up to 80 V: Enough headroom for many audio/switching uses.
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✅ TO-126 Package: Easy to mount on a heatsink for improved dissipation.
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✅ Complement to BD139/BD135 family: Enables paired configurations in amplifier circuits.
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✅ Stable gain (hFE) at various currents: Ensures predictable performance.
⚙️ Technical Specifications
| Parameter | Value | Notes |
|---|---|---|
| Type | PNP Silicon Transistor | General-purpose medium power |
| Maximum Collector-Emitter Voltage (Vce) | 80 V | |
| Maximum Collector Current (Ic) | 1.5 A (-1.5 A for PNP) | |
| Power Dissipation (Pc) | 12.5 W (at Tc = 25°C) | |
| Transition Frequency (fT) | ~50-190 MHz typical range | |
| Package | TO-126 (also SOT-32) |
🧰 Applications
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🔊 Audio amplifier driver stages – PNP transistor in push-pull arrangements.
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⚙️ Switching and drive circuits – moderate current switching tasks up to ~1.5 A.
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💡 General-purpose electronics repair – replacing older PNP transistors in boards.
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🏠 DIY electronics & hobby projects – reliable component for learners and tinkerers.
💎 Why Choose Rafiq Electronics
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✅ We stock genuine BD140 transistors with verified specs.
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✅ Fast and nationwide shipping across Pakistan.
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✅ Competitive pricing for both hobbyists and professionals.
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✅ Support and advice available for component selection and circuit use.
When you choose the BD140 Transistor from Rafiq Electronics, you’re getting a dependable part that’s ready for everything from audio circuits to switching boards.
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