S8550 Datasheet & Equivalents
PNP
SOT-23
General Purpose
FOSAN
VCEO
25V
Ic Max
500mA
Pd Max
225mW
hFE Gain
400
Quick Reference
The S8550 is a PNP bipolar junction transistor in a SOT-23 package, manufactured by FOSAN. It supports a breakdown voltage of 25V and continuous collector current of 500mA. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | FOSAN | Original Manufacturer |
| Package | SOT-23 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 25V | Max breakdown voltage |
| Collector Current (Ic) | 500mA | Max current handling |
| Power Dissipation (Pd) | 225mW | Max thermal limit |
| DC Current Gain (hFE) | 400 | Base signal amplification ratio |
| Transition Frequency (fT) | 120MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | 600mV | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | 5V | Max emitter-base breakdown |
| Collector Cutoff Current | 100nA | Leakage current when OFF |
| Operating Temp | - | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| S8550 2TY 0.4 | PNP | SOT-23 | 25V | 500mA | 400 | 300mW | TDSEMIC 📄 PDF |
| S9012-H | PNP | SOT-23 | 25V | 500mA | 400 | 300mW | YANGJIE 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 400 | 300mW | GOODWORK 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 400 | 300mW | JSMSEMI 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 400 | 300mW | MDD(Microdiod... 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 400 | 300mW | FOSAN 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 400 | 300mW | Guangdong Hot... 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 400 | 300mW | YONGYUTAI 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 400 | 300mW | FUXINSEMI 📄 PDF |
| MMS8550HE3-H-HXY | PNP | SOT-23 | 25V | 500mA | 350 | 300mW | HXY MOSFET 📄 PDF |
| MMS9012HE3-H-HXY | PNP | SOT-23 | 25V | 500mA | 350 | 300mW | HXY MOSFET 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 260 | 300mW | LGE 📄 PDF |
| MMS9012-H-TP | PNP | SOT-23 | 25V | 500mA | 200 | 300mW | MCC 📄 PDF |
| BC808-25LT1G | PNP | SOT-23 | 25V | 500mA | 160 | 225mW | onsemi 📄 PDF |
| S8550 2TY(RANGE:200-350) | PNP | SOT-23 | 25V | 500mA | 120 | 300mW | JSCJ 📄 PDF |
| S8550(RANGE:120-200) | PNP | SOT-23 | 25V | 500mA | 120 | 300mW | JSCJ 📄 PDF |
| S9012 2T1(RANGE:200-350) | PNP | SOT-23 | 25V | 500mA | 120 | 300mW | JSCJ 📄 PDF |
| S9012(RANGE:120-200) | PNP | SOT-23 | 25V | 500mA | 120 | 300mW | JSCJ 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 120 | 300mW | BORN 📄 PDF |
| S9012 | PNP | SOT-23 | 25V | 500mA | 120 | 300mW | R+O 📄 PDF |