| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 | 
|---|
| 1 | UNR521F | Silicon NPN epitaxial planar type | 449K |   |   | 
| 2 | UNR521F(UN521F) | Composite Device - Transistors with built-in Resistor | 292K |   |   | 
| 3 | UNR521F|UN521F | Composite Device - Transistors with built-in Resistor | 449K |   |   |