S8550
UMW
Needs validationhigh risk
S8550 is a PNP SOT-23 BJT candidate only for relaxed, low-voltage BC856B applications.
Best Alternatives to BC856B
BC856B is a PNP SOT-23 BJT rated -65V and -100mA. Listed candidates need review because no pinout is verified.
AI replacement insight
Electrical riskhigh
Kept parts have lower VCEO.
Package riskmedium
SOT-23 matches, pinout missing.
Firmware risklow
Discrete BJT.
Sourcing riskmedium
Some records lack datasheet match.
Can it be replaced directly?
No verified pin-compatible replacement is supported by the provided data.
Best replacement path
Check same PNP SOT-23 parts with VCEO >= -65V and matching pinout.
Main risk
Voltage downgrade and unverified pinout.
Recommended alternatives
1Alternative comparison matrix
| Feature / factor | BC856B | BC807-25 | S8550 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT-23 | SOT-23 | SOT-23 — same package; S8550: same package | |
| Pinout | 3 pins | 3 pins | 3 pins | 3 pins — pin functions missing; S8550: pin functions missing | |
| Voltage | -65V | -45V | -25V | -45V / -25V — lower VCEO; S8550: much lower VCEO | |
| Current | -0.1A | -0.5A | -0.5A | -0.5A — higher IC; S8550: higher IC | |
| Temperature | -55 to 150C | -55 to 150C | - | -55 to 150C — same range | |
| Power | 200mW | - | 300mW | 300mW — higher PD |
Application & sourcing insights
Questions & answers
None is verified here. BC807-25 is the closest kept PNP SOT-23 candidate, but its -45V rating is lower.