MMBT4401LT3G
onsemi
Needs validationmedium risk
MMBT4401LT3G is a close NPN SOT-23 candidate with similar voltage and current ratings.
Best Alternatives to MMBT2222ALT1G
MMBT2222ALT1G alternatives should stay NPN, SOT-23, and meet the 40V/600mA stress profile. Pinout is not verified here.
AI replacement insight
Electrical riskmedium
Check hFE, fT, VCE(sat), power.
Package riskmedium
Package matches, pin roles missing.
Firmware risklow
Discrete BJT has no firmware.
Sourcing risklow
Kept candidates are Active.
Can it be replaced directly?
No pin-compatible replacement is verified from the provided fields.
Best replacement path
Review MMBT4401LT3G first; it best matches NPN, SOT-23, 40V and 600mA.
Main risk
Pinout and detailed transistor curves are not confirmed.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | MMBT2222ALT1G | MMBT4401LT3G | MMBTA05LT3G | MMBT6428LT1G | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT-23 | SOT-23 | SOT-23 | SOT-23 — same package text; MMBTA05LT3G: same package text; MMBT6428LT1G: same package text |
| Pinout | 3-pin | 3-pin | 3-pin | 3-pin | 3-pin — pin roles not shown; MMBTA05LT3G: pin roles not shown; MMBT6428LT1G: pin roles not shown |
| Voltage | 40V | 40V | 60V | 50V | 40V / 60V / 50V — no 1.1x margin; MMBTA05LT3G: meets margin; MMBT6428LT1G: meets margin |
| Current | 600mA | 600mA | 500mA | 200mA | 600mA / 500mA / 200mA — same IC rating; MMBTA05LT3G: lower IC; MMBT6428LT1G: large downgrade |
| Temperature | -55..150C | -55..150C | - | - | -55..150C — same range |
| Application | 300MHz fT | - | 100MHz fT | amp | 100MHz fT / amp — slower device; MMBT6428LT1G: high gain focus |
Application & sourcing insights
Questions & answers
MMBT4401LT3G is the closest candidate from the provided data, but it still needs FAE pinout and curve review.