MMSZ5221ET1 Series Preferred Device Zener Voltage.
ON Semiconductor
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MMSZ52xxET1G - Zener Voltage Regulators 500 mW SOD-123 Surface Mount
MMSZ5221ET1 Series Preferred Device Zener Voltage Regulators 500 mW SOD−123 Surface Mount Three complete series of Zener diodes are offered in the co.