BD677 Datasheet & Equivalents
NPN
SOT-32
High Power
ST
VCEO
60V
Ic Max
4A
Pd Max
40W
hFE Gain
750
Quick Reference
The BD677 is a NPN bipolar junction transistor in a SOT-32 package, manufactured by ST. It supports a breakdown voltage of 60V and continuous collector current of 4A. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | ST | Original Manufacturer |
| Package | SOT-32 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 60V | Max breakdown voltage |
| Collector Current (Ic) | 4A | Max current handling |
| Power Dissipation (Pd) | 40W | Max thermal limit |
| DC Current Gain (hFE) | 750 | Base signal amplification ratio |
| Transition Frequency (fT) | - | Max operating frequency |
| Saturation Voltage (VCEsat) | 2.5V | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | - | Max emitter-base breakdown |
| Collector Cutoff Current | 2mA | Leakage current when OFF |
| Operating Temp | - | Safe junction temperature range |