Marking of electronic components, SMD Codes K21, K21**. QS6K21, QS8K21, TS421QT, SSM1200SPT, TS421IQT, ic marking code.
| PartNumber | Marking code | Manufacturer | Package |
|---|---|---|---|
| QS6K21 | K21 | TSMT5 | |
| QS8K21 | K21 | TSMT8 | |
| TS421QT | K21 | Ste | DFN-8 |
| SSM1200SPT | K21 | Chm | SOD-123 |
| TS421IQT | K21A | DFN8 | |
| TS421IST | K21A | MiniSO-8 | |
| TS421-2QT | K21A | Ste | DFN-8 |
| TS421-2IQT | K21B | DFN8 | |
| TS421-2IST | K21B | MiniSO-8 | |
| TS421-4QT | K21B | Ste | DFN-8 |
| TS421-4IQT | K21C | DFN8 | |
| TS421-4IST | K21C | MiniSO-8 | |
| TS421-8QT | K21C | Ste | DFN-8 |
| TS421-8IQT | K21D | DFN8 | |
| TS421-8IST | K21D | MiniSO-8 |