| Компонент | Описание | Производитель | |
| ZMM55-A4V3 | Surface mount zener diode, 500mW. Nominal zener voltage 4.0-4.6 V. Test current 5 mA. +-1% tolerance. |
Jinan Gude Electronic Device |
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| ZMM55-A4V7 | Surface mount zener diode, 500mW. Nominal zener voltage 4.4-5.0 V. Test current 5 mA. +-1% tolerance. |
Jinan Gude Electronic Device |