Circuit Protection Diode. It protects the components which are responsive to the flow of current through them in the wrong direction. A protection diode is used to block this reverse current flow.
Related content a replacement to lm75 tmp75 digital temperature sensors. Once reversed this diode provides an alternate path for electrons largely bypassing the main circuit and protecting it from these effects. This helps to protect components in circuitry that can be damaged from reverse current.
Steering diode arrays protect communication ports from surges and esd.
Instead the voltage travels through the main load. It is space saving and equally if not more efficient in protecting the circuit. A diode is a device that allows current to flow in through one direction but not the other. This helps to protect components in circuitry that can be damaged from reverse current.