| 2SD1978 Datasheet |
| Type | Transistor | |
| Case | TO92L | |
| Manufacturer | Hitachi | |
| Polarity | NPN | |
| Maximum Collector Power Dissipation (Pc) | 0.9 W | |
| Maximum Collector-Base Voltage |Vcb| | 120 V | |
| Maximum Collector Current |Ic max| | 1.5 A | |
| Max. Operating Junction Temperature (Tj) | 150 °C | |
| Forward Current Transfer Ratio (hFE), MIN | 10000 | |
| SKU | 86234 | |