BD679A NPN Darlington Transistor 80V 4A 40W TO-126
The BD679A is a monolithic NPN Darlington power transistor in a TO-126 (SOT-32) style package, engineered for high-gain amplification and robust switching in industrial and consumer power circuits, with integrated antiparallel diode and planar base-island technology for reliable thermal and electrical performance.
Features
- NPN monolithic Darlington configuration with integrated antiparallel collector-emitter diode for robust switching performance.
- High DC current gain enabling reduced base drive requirements.
- Collector-emitter sustaining voltage rated for 80V for BD679A family members.
- Continuous collector current of 4A with 6A peak capability for transient loads.
- Total power dissipation of 40W at Tcase =25°C for thermal-managed applications.
- Low saturation voltages under rated drive (VCE(sat) typ. up to 2.8V at IC=2A, IB=40mA).
- Wide operating junction temperature up to 150°C for demanding environments.
Specifications
| Symbol | Parameter | Value | Unit |
|---|---|---|---|
| VCBO | Collector-base voltage (IE = 0) | 80 | V |
| VCEO | Collector-emitter voltage (IB = 0) | 80 | V |
| VEBO | Emitter-base voltage (IC = 0) | 5 | V |
| IC | Collector current | 4 | A |
| ICM | Collector peak current | 6 | A |
| IB | Base current | 0.1 | A |
| PTOT | Total dissipation at Tcase = 25°C | 40 | W |
| Tstg | Storage temperature | -65 to 150 | °C |
| TJ | Max. operating junction temperature | 150 | °C |
For full electrical specifications, check the datasheet down below.
Applications
- Linear regulator stages and medium-power amplifier circuits requiring high current gain.
- General purpose power switching in industrial control, motor drivers, and relay drivers.
- Audio amplifier output stages and consumer electronics with thermal management.
- Prototyping and replacement in TO-126 power transistor footprints.
Package Contents
- 1x BD679A NPN Darlington Transistor TO-126.
Documents
| Datasheet | BD679A |
| CAD Files | Download |
