FZT491ATA Datasheet & Equivalents
NPN
SOT-223
General Purpose
DIODES
VCEO
40V
Ic Max
1A
Pd Max
2W
hFE Gain
300
Quick Reference
The FZT491ATA is a NPN bipolar junction transistor in a SOT-223 package, manufactured by DIODES. It supports a breakdown voltage of 40V and continuous collector current of 1A. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | DIODES | Original Manufacturer |
| Package | SOT-223 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 40V | Max breakdown voltage |
| Collector Current (Ic) | 1A | Max current handling |
| Power Dissipation (Pd) | 2W | Max thermal limit |
| DC Current Gain (hFE) | 300 | Base signal amplification ratio |
| Transition Frequency (fT) | 150MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | 500mV | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | 7V | Max emitter-base breakdown |
| Collector Cutoff Current | 100nA | Leakage current when OFF |
| Operating Temp | -55℃~+150℃ | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| BCP54-16 | NPN | SOT-223 | 45V | 1A | 100 | 1.5W | JSCJ 📄 PDF |
| TPBCP54-16 | NPN | SOT-223 | 45V | 1A | 100 | 1.5W | TECH PUBLIC 📄 PDF |
| BCP54 | NPN | SOT-223 | 45V | 1A | 63 | 1.33W | Shikues 📄 PDF |
| BCP54-16 | NPN | SOT-223 | 45V | 1A | 63 | 1.35W | Nexperia 📄 PDF |
| 115 | NPN | SOT-223 | 45V | 1A | 10 | 2W | DIODES 📄 PDF |
| BCP54TA | NPN | SOT-223 | 60V | 1A | 250 | 1.5W | HXY MOSFET 📄 PDF |
| BCP55 | NPN | SOT-223 | 60V | 1A | 250 | 1.5W | MSKSEMI 📄 PDF |
| BCP55-16-MS | NPN | SOT-223 | 60V | 1A | 250 | 1.5W | JSMSEMI 📄 PDF |
| BCP55-JSM | NPN | SOT-223 | 60V | 1A | 250 | 1.5W | Slkor 📄 PDF |
| BCP55-16 | NPN | SOT-223 | 60V | 1A | 100 | 1.5W | JSCJ 📄 PDF |
| BCP55-16 | NPN | SOT-223 | 60V | 1A | 100 | 1.5W | TECH PUBLIC 📄 PDF |
| BCP55-16 | NPN | SOT-223 | 60V | 1A | 25 | 1.5W | R+O 📄 PDF |
| BCP55-16 | NPN | SOT-223 | 60V | 1A | 10 | 2W | DIODES 📄 PDF |
| BCP5510TA | NPN | SOT-223 | 60V | 1A | 10 | 2W | DIODES 📄 PDF |
| BCP5516TA | NPN | SOT-223 | 60V | 1A | 10 | 2W | DIODES 📄 PDF |
| BCP55TA | NPN | SOT-223 | 60V | 2A | 75 | 800mW | onsemi 📄 PDF |
| PZT651T1G | NPN | SOT-223 | 70V | 2A | 500 | 3W | DIODES 📄 PDF |
| FZT692BTA | NPN | SOT-223 | 80V | 1A | 250 | 1.5W | JSMSEMI 📄 PDF |
| BCP56-10-JSM | NPN | SOT-223 | 80V | 1A | 250 | 1.5W | onsemi 📄 PDF |
| BCP56-16T3G | NPN | SOT-223 | 80V | 1A | 250 | 1.5W | MSKSEMI 📄 PDF |