Diodes

Diodes are fundamental semiconductors used to control current, convert AC to DC, regulate voltage, and safeguard circuits against spikes. Online Components offers a comprehensive range of bridge rectifiers, Schottky, Zener, PIN, and varactor types, supporting applications from power supplies to RF and signal systems.

Online Components stocks more than 20,000 diode part numbers from authorized suppliers like Microchip, Diotec Semiconductors, Navitas and Taitron. With deep inventory, competitive pricing, and fast U.S.-based fulfillment, we make it simple to source the diodes you need for production or design.

How to Choose the Right Diode

Function

Bridge rectifiers convert AC to DC for power supplies. Schottky diodes improve efficiency with a low forward voltage drop. Zener diodes regulate and stabilize voltage. PIN diodes provide fast RF switching. Varactors offer tunable capacitance for oscillators and filters.

Electrical Ratings

Important parameters include forward current, reverse voltage, recovery time, and power dissipation. Choosing components with some margin above your system’s requirements helps extend reliability and reduce failure risk.

Package & Mounting

Through-hole packages offer mechanical strength and ease of manual assembly, while surface-mount (SMD) versions save board space and support automated production. Select the style that best aligns with your PCB layout and assembly method.

Popular Applications for Diodes

• Power Supplies & Converters: Rectifiers and Schottky diodes in AC-DC and DC-DC circuits.
• Signal & RF Systems: PIN and varactor diodes in RF switches, modulators, and tuning circuits.
• Voltage Regulation: Zener diodes in reference circuits, clamping, and ESD protection.
• Motor & Relay Protection: Flyback diodes across inductive loads to prevent voltage spikes.
• Consumer & Automotive Electronics: Diodes for battery management, LED drivers, and infotainment systems.

Why Buy Diodes from Online Components?

• Authorized Distributor Since 1999 — Genuine, traceable supply from industry-leading manufacturers.
• Extensive Selection — 20,000+ diode part numbers across multiple families.
• Fast Fulfillment — Same-day U.S. shipping with flat-rate global delivery.
• Competitive Pricing — Transparent screen pricing and low MOQs for any order size.
• Easy Procurement — Search by function, rating, or package to streamline sourcing.

Diodes: What You Should Know

What’s the key difference between Schottky and standard rectifier diodes?

Schottky diodes offer a much lower forward voltage drop, making them more efficient in power supply and high-speed switching applications.

When should I use a Zener diode?

Zener diodes are ideal for voltage regulation and overvoltage protection. They maintain a stable reference voltage when reverse-biased.

What role do PIN diodes play in RF applications?

PIN diodes, with their wide intrinsic layer, excel in RF switching and attenuator circuits where low distortion and fast response are required.

How do I select the right diode for power circuits?

Confirm forward current, reverse voltage, recovery time, and thermal limits. Select parts with a margin that exceeds the expected operating conditions.