Diodes

Diodes — New & Used

Diodes are two-terminal semiconductor components that conduct current primarily in one direction, making them essential for rectification, signal control, and circuit protection. From rectifier and Zener diodes to Schottky, TVS and signal types, they appear in power supplies, control boards, drives, and electronic assemblies.

At Surplus Select, we stock a range of new and used OEM diodes, including rectifier diodes, fast-recovery diodes, Zener and TVS protection diodes, Schottky diodes and bridge rectifiers. Our surplus pricing helps repair shops, panel builders and electronics maintenance teams source quality devices without paying full catalog cost.

Price Match — We match any authorized distributor on identical in-stock parts, so you can source parts at surplus pricing with distributor-level assurance.

Trade-In Credit — Have quality new surplus items? Trade them in for store credit toward the parts you actually need.

Fast U.S. Shipping — Most orders ship same or next business day from our U.S. warehouse to keep your line running.

Find Your Diodes Fast (Search-First)

Search your part or series number (e.g., 1N5408 rectifier diode, 1N4148 signal diode, TVS diode SMAJ24A, bridge rectifier KBPC3510).
No PN? Try specs like “10 A rectifier diode 1000 V”, “Schottky diode 40 V 5 A”, “Zener diode 12 V 1 W”, or “TVS diode 600 W”.
Need a specific function? Add terms such as rectifier, Zener, Schottky, TVS, fast-recovery, or bridge to refine your search.

Applications & Use Cases

Power supplies & rectifiers: Use rectifier and bridge diodes for AC-to-DC conversion in supplies, chargers, and control panels.
Voltage regulation & references: Zener diodes provide simple, robust voltage references and over-voltage clamps in DC circuits.
Protection & surge suppression: TVS and protection diodes safeguard sensitive electronics against spikes, transients and reverse polarity.
Signal & switching circuits: Small-signal and fast-recovery diodes support logic steering, flyback suppression, and RF or timing circuits.
Repair, retrofit & prototyping: Keep a range of general-purpose and specialty diodes on hand for troubleshooting, board-level repair and new builds.

Why Buy Diodes from Surplus Select

New & Used Options: OEM diodes and rectifier assemblies at surplus pricing for repair, panel builds and production support.
Wide Type Coverage: Rectifier, Zener, Schottky, TVS, fast-recovery, bridge and signal diodes available across voltage and current ranges.
Budget-Friendly Sourcing: Surplus inventory helps you control maintenance and build costs while using name-brand components.
Fast Shipping: Most orders ship same or next business day so your boards, panels and repairs stay on schedule.