PNP Transistor – BD136
🛠️ PNP Silicon Power Transistor – BD136 (TO‑126)
Overview
The BD136 is a versatile PNP medium-power transistor in a TO‑126 package, ideal for switching and amplification in audio circuits, power supplies, and general-purpose electronics. It supports up to 1.5 A continuous current, 45 V collector-emitter voltage, and 12.5 W dissipation (with proper heatsinking).
Technical Specifications
| Parameter | Value |
|---|---|
| Package | TO‑126 (tab = collector) |
| Collector Current (IC) | 1.5 A continuous; 3 A pulse |
| Collector‑Emitter Voltage | 45 V |
| DC Current Gain (h<sub>FE</sub>) | 40–160 (at IC = 0.15 A) |
| Power Dissipation | 12.5 W (with heatsink) / 1.25 W (ambient) |
| Max Frequency (f<sub>T</sub>) | ~190 MHz |
| Operating Temp Range | –55 °C to +150 °C |
Pinout (Front view, flat face):
Emitter
Collector (tab)
Base
Applications
Audio amplifier stages
Automotive power switches
Driving relays and lamp circuits
Motor controller or regulation
Complementary stages in power supplies
✅ Resources
🎥 YouTube Tutorial: [“Easy BD136 Transistor Checking with Multimeter Hacks Revealed”] youtube.com