| Standard ID | SJ 1847-1981 (SJ1847-1981) |
| Description (Translated English) | Detail specification for silicon PNP epitaxial planar low power switching transistors, Type 3CK121 |
| Sector / Industry | Electronics Industry Standard |
| Classification of Chinese Standard | L42 |
| Word Count Estimation | 3,373 |
| Date of Implementation | 1982/5/1 |
| Regulation (derived from) | Industry-Science (2010) No. 77 |