Specs side by side
2 parts compared · 9 differing specs across 9 total parameters.
| Parameter | ||
|---|---|---|
| Case | TO-92 / SOT-23 | - |
| Catalog Status | - | Unlisted / Spot Sourcing on Demand |
| Component Category | Small-Signal Transistors | - |
| Market Reality | The 2N3904 NPN and its 2N3906 PNP complement are the American small-signal standard: 40V, 200mA, 625mW, TO-92 with E-B-C lead order, gain optimized around 10mA, and SOT-23 twins (MMBT3904 / MMBT3906) in more new designs than the through-hole originals. The repair trap has two layers: the European counterpart BC547 is C-B-E in the same TO-92 body - a straight insertion swaps emitter and collector into reverse-active operation - and the SOT-23 twins number their pins 1 = Base, 2 = Emitter, 3 = Collector, which follows neither lead order. Every substitution in this family answers the pinout question before the electrical one. | - |
| Procurement Desk | - | Shenzhen Spot Sourcing Desk (24–48h Dispatch) |
| Rfq Quote | - | Upload BOM or request quote for quantity ladder pricing |
| Role In Circuit | Original Reference Part | - |
| Sourcing Status | Active Shenzhen Spot Sourcing (24–48h) | - |
| Verification | - | Original factory packaging & pinout inspection before dispatch |
Parts
- 2N3904 / 2N3906 · onsemi
- BC547BC557 · onsemi (Spot Sourcing / RFQ)