BC857BT Datasheet & Equivalents
PNP
SOT-523
General Purpose
TECH PUBLIC
VCEO
45V
Ic Max
100mA
Pd Max
265mW
hFE Gain
475
Quick Reference
The BC857BT is a PNP bipolar junction transistor in a SOT-523 package, manufactured by TECH PUBLIC. It supports a breakdown voltage of 45V and continuous collector current of 100mA. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | TECH PUBLIC | Original Manufacturer |
| Package | SOT-523 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 45V | Max breakdown voltage |
| Collector Current (Ic) | 100mA | Max current handling |
| Power Dissipation (Pd) | 265mW | Max thermal limit |
| DC Current Gain (hFE) | 475 | Base signal amplification ratio |
| Transition Frequency (fT) | 100MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | 650mV | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | 5V | Max emitter-base breakdown |
| Collector Cutoff Current | 15nA | Leakage current when OFF |
| Operating Temp | -55℃~+150℃ | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| BC857BT-7-F | PNP | SOT-523 | 45V | 100mA | 220 | 150mW | DIODES 📄 PDF |
| BC857CT-7-F | PNP | SOT-523 | 45V | 100mA | 220 | 150mW | DIODES 📄 PDF |
| DTA143EE | PNP | SOT-523 | 50V | 100mA | 1 | 150mW | JSCJ 📄 PDF |
| MMBTSA1774E | PNP | SOT-523 | 50V | 150mA | 560 | 150mW | Huixin 📄 PDF |
| 2DA1774R-7-F | PNP | SOT-523 | 50V | 150mA | 180 | 150mW | DIODES 📄 PDF |
| 2SA1774 | PNP | SOT-523 | 50V | 150mA | 120 | 150mW | JSCJ 📄 PDF |
| 2SA1774-R | PNP | SOT-523 | 50V | 150mA | 120 | 150mW | Slkor 📄 PDF |
| 2SA1832-Y | PNP | SOT-523 | 50V | 150mA | 70 | 100mW | TOSHIBA 📄 PDF |