Peak Inverse Voltage

Peak inverse voltage (PIV) is the maximum reverse-bias voltage that a diode or rectifier can withstand without entering destructive breakdown, making it a key rating in electrical engineering. During the reverse half-cycle of an alternating-current waveform, the diode blocks current while an electric field develops across its junction; if this voltage exceeds the PIV rating, avalanche or Zener breakdown can cause excessive current, overheating, and failure. Engineers use PIV to select diodes for power supplies, bridge rectifiers, and switching circuits, often including a safety margin to accommodate voltage spikes and improve reliability under changing load conditions.

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