MMBTA44
Yangzhou Yangjie Electronic Technology Co.,Ltd
Needs validationmedium risk
MMBTA44 is a higher-voltage NPN SOT-23 candidate for BC846B, pending pinout and gain checks.
Best Alternatives to BC846B
BC846B is a 65V, 100mA NPN SOT-23 transistor. Current candidates need FAE review because pinout is not verified.
AI replacement insight
Electrical riskhigh
BC817-25 is lower voltage.
Package riskmedium
SOT-23 matches but pinout is missing.
Firmware risklow
No firmware for a BJT.
Sourcing risklow
Kept candidates are Active.
Can it be replaced directly?
No pin-compatible replacement is confirmed from the provided data.
Best replacement path
Use an NPN SOT-23 with verified pinout, >=72V VCEO, suitable hFE, and adequate power rating.
Main risk
Unverified pinout and VCEO mismatch.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | BC846B | MMBTA44 | BC817-25 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT-23 | SOT-23 | SOT-23 — same package; BC817-25: same package | |
| Pinout | 3-pin BJT | not provided | not provided | not provided — no pin map; BC817-25: no pin map | |
| Voltage | 65 V | 400 V | 45 V | 400 V / 45 V — VCEO higher; BC817-25: below target | |
| Current | 100 mA | 100/200 mA | 500 mA | 100/200 mA / 500 mA — ES conflict; BC817-25: higher Ic | |
| Application | hFE 200-450 | 100-300 | - | 100-300 — gain lower | |
| Temperature | -55 to 150C | - | -55 to 150C | -55 to 150C — same range |
Application & sourcing insights
Questions & answers
From these candidates, MMBTA44 is the safest stress-rated option, but it still needs pinout and gain review.