What are Power Diodes?

Power diodes are semiconductor devices designed to conduct current in one direction while blocking it in the opposite direction under high voltage and high current conditions. They operate based on a p-n junction structure that allows forward conduction when biased above the junction threshold and provides reverse blocking capability when reverse-biased. Their internal design is optimized to handle significant electrical stress, thermal dissipation, and switching transients in power conversion systems.

In power electronic applications such as rectification, freewheeling, clamping, and snubber networks, power diodes play a critical role in controlling current flow and protecting switching devices. Their electrical characteristics determine conduction losses, blocking capability, surge handling, and overall system reliability. Proper selection based on defined specifications ensures efficient operation, thermal stability, and compliance with voltage and current requirements in demanding environments.

Key Specifications

• Types: Identifies the diode technology and intended operating characteristics, such as standard recovery, fast recovery, or Schottky structures. The type influences switching behavior, reverse recovery performance, and suitability for specific converter topologies.
• Configuration: Defines how one or more diodes are arranged within a single package, such as single, dual, or bridge configurations. Configuration determines circuit integration, space utilization, and system-level design flexibility.
• Forward Voltage: Represents the voltage drop across the diode when conducting in the forward direction at a specified current. Forward voltage directly impacts conduction losses and thermal dissipation in power circuits.
• Reverse Voltage: Indicates the maximum continuous voltage the diode can block in the reverse-biased condition without breakdown. This parameter ensures safe operation within the system’s voltage stress limits.
• Forward Current: Specifies the maximum continuous current the diode can conduct under defined thermal conditions. It determines current-carrying capability and influences device sizing and heat management.
• Reverse Current: Refers to the leakage current that flows when the diode is reverse-biased below its breakdown voltage. Reverse current affects blocking performance and contributes to standby losses and thermal considerations.
• Repetitive Peak Reverse Voltage: Defines the maximum reverse voltage that can be repeatedly applied without causing device degradation. This parameter is critical in applications with recurring voltage transients or switching events.
• Non-Repetitive Peak Forward Current: Indicates the maximum surge current the diode can withstand for a short duration without damage. It is essential for evaluating robustness against inrush currents and transient overload conditions.

The Largest Database of Power Diodes

everything PE has listed Power Diodes from the leading manufacturers and made them searchable by specification. You can enter the key parameters and the search tool will scan catalogs from the leading manufacturers to identify products that meet your spec. Once you find Power Diodes that meet your requirements, you can view product information, download datasheets or request quotations. Quotation requests will be routed to the manufacturer of the product who will get back to you directly. The quotation will also be routed to distributors of the product in your region.