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The saturation current shall be below the expected peak current of the application. Beyond this point, the inductor will rapidly lose inductance, and can let much higher currents through than what is expected. Care should be taken especially in SMPS applications to account for the peak of the expected ripple current in the inductor.
Diodes
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Package
The preferred package for low power applications is SOD-123. The preferred package for high power applications is DO-214AC.
Rectifying Diodes
Standard PN junction diodes can be used in rectifying applications where efficiency is not a concern. For cases where higher efficiency is desired, Schottky diodes can be used as they have a lower forward voltage.
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TVS and Zener
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Diodes
TVS and Zener diodes are similar in their behaviour but differ in their construction. Both used for their reverse breakdown characteristics.
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