MMBT2222
onsemi
Needs validationmedium risk
MMBT2222 is electrically close to MMBT4401 but needs pinout and sourcing review.
Best Alternatives to MMBT4401
MMBT4401 is a 40V, 600mA NPN SOT-23 transistor. Alternatives need pinout, power, and switching-speed checks before use.
AI replacement insight
Electrical riskmedium
Power and fT vary by candidate.
Package riskmedium
SOT-23 shown, pinout not verified.
Firmware risklow
Discrete BJT; no firmware impact.
Sourcing riskmedium
MMBT2222 is marked obsolete.
Can it be replaced directly?
No verified pin-compatible replacement is proven from the provided fields.
Best replacement path
Review PMBT2222A first for active sourcing, then MMBT2222 if obsolete stock is acceptable.
Main risk
Missing pinout evidence and power derating.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | MMBT4401 | MMBT2222 | PMBT2222A | FMMT493 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT-23 | SOT-23 | SOT-23 | SOT-23 — same body; PMBT2222A: same body; FMMT493: same body; 2SC1815: same body |
| Pinout | verified | missing | missing | missing | missing — not proven; PMBT2222A: not proven; FMMT493: not proven; 2SC1815: not proven |
| Voltage | 40V | 40V | 40V | 100V | 40V / 100V / 50V — VCEO match; PMBT2222A: VCEO match; FMMT493: ample VCEO; 2SC1815: VCEO ok |
| Current | 600mA | 600mA | 600mA | 1A | 600mA / 1A / 150mA — IC match; PMBT2222A: IC match; FMMT493: higher IC; 2SC1815: large derate |
| Power | 0.3W | 0.3W | 200mW/300mW | 250mW | 0.3W / 200mW/300mW / 250mW — PC match; PMBT2222A: conflict; FMMT493: derate needed; 2SC1815: lower PC |
| Lifecycle | Active | Obsolete | - | - | Obsolete — sourcing risk |
| Temperature | not listed | - | not listed | - | not listed — check DS |
| Application | 250MHz | - | - | 150MHz | 150MHz / 80MHz — slower fT; 2SC1815: slower |
Application & sourcing insights
Questions & answers
PMBT2222A is the best active candidate from the provided data, but pinout and power rating must be verified.