| Standard ID | SJ 1409-1978 (SJ1409-1978) |
| Description (Translated English) | Detail specification for silicon NPN high-frequency high pwer transistors, Type 3DA3 |
| Sector / Industry | Electronics Industry Standard |
| Classification of Chinese Standard | L42 |
| Word Count Estimation | 3,351 |
| Date of Implementation | 1979/7/1 |
| Regulation (derived from) | Industry-Science (2010) No. 77 |