BC857A Datasheet & Equivalents
PNP
SOT-23
General Purpose
MSKSEMI
VCEO
45V
Ic Max
100mA
Pd Max
200mW
hFE Gain
125
Quick Reference
The BC857A is a PNP bipolar junction transistor in a SOT-23 package, manufactured by MSKSEMI. 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 | MSKSEMI | Original Manufacturer |
| Package | SOT-23 | 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) | 200mW | Max thermal limit |
| DC Current Gain (hFE) | 125 | Base signal amplification ratio |
| Transition Frequency (fT) | 100MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | - | 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 |
|---|---|---|---|---|---|---|---|
| BC857 | PNP | SOT-23 | 45V | 100mA | 125 | 250mW | Nexperia 📄 PDF |
| 215 | PNP | SOT-23 | 45V | 100mA | 90 | 225mW | onsemi 📄 PDF |
| BC857ALT1G | PNP | SOT-23 | 45V | 100mA | 90 | 225mW | onsemi 📄 PDF |
| BC857BLT3G | PNP | SOT-23 | 45V | 100mA | 200 | 200mW | JSCJ 📄 PDF |
| S9015(RANGE:300-400) | PNP | SOT-23 | 45V | 100mA | 200 | 200mW | BORN 📄 PDF |
| BC857B | PNP | SOT-23 | 45V | 100mA | 200 | 200mW | R+O 📄 PDF |
| S9015 | PNP | SOT-23 | 45V | 100mA | 40 | 250mW | Nexperia 📄 PDF |
| BCX71J | PNP | SOT-23 | 45V | 100mA | 215 | 225mW | onsemi 📄 PDF |
| 215 | PNP | SOT-23 | 45V | 100mA | 220 | 350mW | DIODES 📄 PDF |
| BCW70LT1G | PNP | SOT-23 | 45V | 100mA | 220 | 250mW | Nexperia 📄 PDF |
| AC857BQ-7 | PNP | SOT-23 | 45V | 100mA | 220 | 310mW | MCC 📄 PDF |
| BC857B | PNP | SOT-23 | 45V | 100mA | 220 | 200mW | Slkor 📄 PDF |
| 215 | PNP | SOT-23 | 45V | 100mA | 220 | 200mW | HXY MOSFET 📄 PDF |
| BC857B-TP | PNP | SOT-23 | 45V | 100mA | - | 200mW | SEP 📄 PDF |
| BC857B | PNP | SOT-23 | 45V | 100mA | 400 | 200mW | HXY MOSFET 📄 PDF |
| BC857B | PNP | SOT-23 | 45V | 100mA | 420 | 200mW | JSCJ 📄 PDF |
| S9015 | PNP | SOT-23 | 45V | 100mA | 420 | 250mW | Nexperia 📄 PDF |
| MMS9015HE3-L-HXY | PNP | SOT-23 | 45V | 100mA | 420 | 310mW | DIODES 📄 PDF |
| BC857(RANGE:420-800) | PNP | SOT-23 | 45V | 100mA | 420 | 250mW | Nexperia 📄 PDF |
| BC857C | PNP | SOT-23 | 45V | 100mA | 420 | 200mW | R+O 📄 PDF |