| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | UNR421D | Silicon NPN epitaxial planar type | 342K |
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| 2 | UNR421D | Silicon NPN epitaxial planar type | 342K |
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| 3 | UNR421D(UN421D) | Composite Device - Transistors with built-in Resistor | 553K |
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| 4 | UNR421D|UN421D | Composite Device - Transistors with built-in Resistor | 346K |
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