| 2SD1999 Datasheet |
| Type | Transistor Silicon NPN Darlington + Diode | |
| Case | SOT89 | |
| Manufacturer | Sanyo Semiconductor | |
| Mat. | Silicon Logic | |
| Polarity | NPN | |
| Mat. Struct. | NPN | |
| Pinout Equivalence Number | 3-10 | |
| Surface Mounted Yes/No | YES | |
| Maximum Collector Power Dissipation (Pc) | 15 W | |
| Maximum Collector-Base Voltage |Vcb| | 30 V | |
| Maximum Collector Current |Ic max| | 4 A | |
| Max. Operating Junction Temperature (Tj) | 150 °C | |
| Forward Current Transfer Ratio (hFE), MIN | 150 | |
| SMD Transistor Code | DN | |
| SKU | 345753 | |