What are the two major ratings that must not be exceeded for silicon-diode rectifiers used in power-supply circuits?

When designing power supplies, silicon diodes act as one-way valves for electric current, and their survival depends on two critical thresholds: Peak Inverse Voltage (PIV) and average forward current. Peak Inverse Voltage is the maximum reverse-bias voltage a diode can withstand before it breaks down and allows current to flow backward. If the AC voltage peaks higher than the PIV rating, the diode will likely be destroyed. Average forward current is the maximum continuous current the diode can safely pass when conducting. If this limit is exceeded, the diode will generate too much heat and burn out. Other options mentioning average power or impedance do not represent the primary safety ratings used for selecting standard rectifier diodes.