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A shorted power diode conducts in both directions and usually reads near zero volts or very low resistance on a multimeter. An open diode blocks current in both directions and typically reads OL. A good diode conducts only forward: it …

TVS and Zener diodes protect electronic circuits by diverting excess voltage away from sensitive components. A TVS diode handles brief, high-energy surges from ESD, switching, or lightning, while a Zener diode maintains a controlled voltage during lower-current conditions. Selecting the …