These general-purpose 1N4005 diodes have a wide variety of uses. Diodes let current flow in one direction (anode to cathode). Commonly used for rectifying voltage, these diodes can also be used to protect against reverse polarity voltage. 1-amp forward current with a maximum 30-amp surge. Protects against up to 600V peak inverse voltage (PIV). Polarity indicated by the cathode band. Package of two diodes.