SMD三极管（SOT-23封装）的表示方法
| 型号 | 代码 | 型号 | 代码 | |
| 9011 | 1T | BC817-40 | 6C | |
| 9012 | 2T | BC846A | 1A | |
| 9013 | J3 | BC846B | 1B | |
| 9014 | J6 | BC847A | 1E | |
| 9015 | M6 | BC847B | 1F | |
| 9016 | Y6 | BC847C | 1G | |
| 9018 | J8 | BC848A | 1J | |
| S8050 | J3Y | BC848B | 1K | |
| S8550 | 2TY | BC848C | 1L | |
| 8050 | Y1 | BC856A | 3A | |
| 8550 | Y2 | BC856B | 3B | |
| 2SA1015 | BA | BC857A | 3E | |
| 2SC1815 | HF | BC857B | 3F | |
| 2SC945 | CR | BC858A | 3J | |
| MMBT3904 | 1AM | BC858B | 3K | |
| MMBT3906 | 2A | BC858C | 3L | |
| MMBT2222 | 1P | 2SA733 | CS | |
| MMBT5401 | 2L | UN2111 | V1 | |
| MMBT5551 | G1 | UN2112 | V2 | |
| MMBTA42 | 1D | UN2113 | V3 | |
| MMBTA92 | 2D | UN2211 | V4 | |
| BC807-16 | 5A | UN2212 | V5 | |
| BC807-25 | 5B | UN2213 | V6 | |
| BC807-40 | 5C | 2SC3356 | R23 | |
| BC817-16 | 6A | 2SC3838 | AD | |
| BC817-25 | 6B | 2N7002 | 702 |
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