SJ 1649-1980 PDF English
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Basic data
| Standard ID | SJ 1649-1980 (SJ1649-1980) |
| Description (Translated English) | Detail specification for silicon NPN diffused mesa low-frequency high power transistors, Type 3DD257 and 3DD258 |
| Sector / Industry | Electronics Industry Standard |
| Classification of Chinese Standard | L42 |
| Word Count Estimation | 2,281 |
| Date of Issue | 11/27/1980 |
| Date of Implementation | 6/1/1981 |
| Summary | This standard applies to power dissipation of 30W 3DD257 type, 3DD258 diffusion mesa type silicon NPN low frequency power transistor. The low frequency amplification product for an electronic device, power conversion and low-speed switching circuits. |