S8550 Datasheet & Equivalents
PNP
TO-92
General Purpose
JSMSEMI
VCEO
25V
Ic Max
500mA
Pd Max
625mW
hFE Gain
160
Quick Reference
The S8550 is a PNP bipolar junction transistor in a TO-92 package, manufactured by JSMSEMI. 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 | JSMSEMI | Original Manufacturer |
| Package | TO-92 | 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) | 625mW | Max thermal limit |
| DC Current Gain (hFE) | 160 | Base signal amplification ratio |
| Transition Frequency (fT) | 150MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | - | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | - | 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 |
|---|---|---|---|---|---|---|---|
| S9012(RANGE:144-202) | PNP | TO-92 | 25V | 500mA | 144 | 625mW | JSCJ 📄 PDF |
| S9012 | PNP | TO-92 | 25V | 500mA | 144 | 625mW | JSMSEMI 📄 PDF |
| ZTX549 | PNP | TO-92 | 30V | 1A | 100 | 1W | DIODES 📄 PDF |
| 2N4403BU | PNP | TO-92 | 40V | 600mA | 100 | 625mW | onsemi 📄 PDF |
| 2N4403TAR | PNP | TO-92 | 40V | 600mA | 100 | 625mW | onsemi 📄 PDF |
| PN2907ATFR | PNP | TO-92 | 40V | 800mA | 35 | 625mW | onsemi 📄 PDF |
| BC327-25 | PNP | TO-92 | 45V | 800mA | 160 | 625mW | LGE 📄 PDF |
| BC327-40BK | PNP | TO-92 | 45V | 800mA | 250 | 625mW | DIOTEC 📄 PDF |
| BC327 | PNP | TO-92 | 45V | 800mA | 630 | 625mW | JSCJ 📄 PDF |
| KTA200-Y-AT/P | PNP | TO-92 | 50V | 500mA | 70 | 625mW | KEC 📄 PDF |
| 2SB1116L-G-T92-B | PNP | TO-92 | 50V | 1A | 600 | 750mW | UTC 📄 PDF |
| KSP55TA | PNP | TO-92 | 60V | 500mA | 50 | 625mW | onsemi 📄 PDF |
| KSP2907ATA | PNP | TO-92 | 60V | 600mA | 100 | 625mW | onsemi 📄 PDF |
| 2N2907A | PNP | TO-92 | 60V | 600mA | 100 | 625mW | ST(Semtech) 📄 PDF |
| 2N2907A | PNP | TO-92 | 60V | 600mA | 100 | 625mW | BLUE ROCKET 📄 PDF |
| KTN2907A-AT/PS | PNP | TO-92 | 60V | 600mA | 300 | 625mW | KEC 📄 PDF |
| KSA708(RANGE:120-240) | PNP | TO-92 | 60V | 700mA | 40 | 800mW | JSCJ 📄 PDF |
| KSA708YTA | PNP | TO-92 | 60V | 700mA | 40 | 800mW | onsemi 📄 PDF |
| PN2907ATF | PNP | TO-92 | 60V | 800mA | 100 | 625mW | onsemi 📄 PDF |
| 2SB1116AG-G-T92-B | PNP | TO-92 | 60V | 1A | 200 | 750mW | UTC 📄 PDF |