BC817-40
Nexperia USA Inc.
Needs validationmedium risk
BC817-40 is a close SOT-23 NPN candidate for S9013, but pinout and power data need review.
Best Alternatives to S9013
S9013 is a 25V, 500mA NPN transistor in SOT-23. BC817-40 is the closest candidate here, but pinout and power must be checked.
AI replacement insight
Electrical riskmedium
hFE and PC may differ.
Package risklow
Kept parts are SOT-23 class.
Firmware risklow
Discrete BJT; no firmware.
Sourcing riskmedium
Some catalog data conflicts.
Can it be replaced directly?
No verified pin-compatible replacement is proven from this set.
Best replacement path
Review BC817-40 first; consider MMBTA06 only with thermal derating.
Main risk
Unverified pinout and power dissipation.
Recommended alternatives
1Alternative comparison matrix
| Feature / factor | S9013 | BC817-40 | MMBTA06 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT23/SOT-23 | SOT-23 | SOT23/SOT-23 — same outline; MMBTA06: same outline | |
| Pinout | 3 pins | 3 pins | 3 pins | 3 pins — functions missing; MMBTA06: functions missing | |
| Voltage | 25 V VCEO | 45 V VCEO | 80 V VCEO | 45 V VCEO / 80 V VCEO — meets margin; MMBTA06: meets margin | |
| Current | 0.5 A | 0.5 A | 0.5 A | 0.5 A — same IC max; MMBTA06: same IC max | |
| Power | 0.3 W | 0.25-0.3 W | 0.225 W | 0.25-0.3 W / 0.225 W — conflicting data; MMBTA06: derate needed |
Application & sourcing insights
Questions & answers
BC817-40 is the closest candidate found, but it still needs pinout and power-rating review.