| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | 2N4449U | NPN SILICON SWITCHING TRANSISTOR | 67K |
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| 2 | 2N4449U | NPN SILICON SWITCHING TRANSISTOR | 67K |
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| 3 | 2N4449UA | NPN SILICON SWITCHING TRANSISTOR | 67K |
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| 4 | 2N4449UA | NPN SILICON SWITCHING TRANSISTOR | 67K |
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| 5 | 2N4449UB | NPN SILICON SWITCHING TRANSISTOR | 67K |
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| 6 | 2N4449UB | NPN SILICON SWITCHING TRANSISTOR | 67K |
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