BD681 Datasheet & Equivalents
NPN
TO-126
High Power
YFW
VCEO
100V
Ic Max
4A
Pd Max
40W
hFE Gain
750
Quick Reference
The BD681 is a NPN bipolar junction transistor in a TO-126 package, manufactured by YFW. It supports a breakdown voltage of 100V and continuous collector current of 4A. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | YFW | Original Manufacturer |
| Package | TO-126 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 100V | 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@1.5A,30mA | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | - | Max emitter-base breakdown |
| Collector Cutoff Current | - | Leakage current when OFF |
| Operating Temp | -55℃~+150℃ | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| No exact equivalents found in database. | |||||||