| 型号 | 功能描述 | 生产厂商 | 厂商LOGO | PDF大小 | PDF页数 | 下载地址 | 相关型号 |
| 2N490C | NPN SILICON UNIJUNCTION TRANSISTOR | DIGITRON[Digitron Semiconductors] | ![DIGITRON[Digitron Semiconductors]的LOGO](/PdfSupLogo/994DIGITRON.GIF) | 343.08 Kbytes | 共6页 |  | 无 |
| 2N490C | UNIJUNCTION TRANSISTORS | NJSEMI[New Jersey Semi-Conductor Products, Inc.] | ![NJSEMI[New Jersey Semi-Conductor Products, Inc.]的LOGO](/PdfSupLogo/894NJSEMI.GIF) | 76.36 Kbytes | 共1页 |  | 无 |
| 2N490C | NPN | NJSEMI[New Jersey Semi-Conductor Products, Inc.] | ![NJSEMI[New Jersey Semi-Conductor Products, Inc.]的LOGO](/PdfSupLogo/894NJSEMI.GIF) | 139.36 Kbytes | 共1页 |  | 无 |