1N2128

Single Diodes Overview

The Microchip Technology 1N2128 is a silicon power rectifier diode designed for high-current applications. It features a unidirectional current flow capability with a repetitive peak reverse voltage of 50V and a maximum average forward rectified current rating of 70A. The device utilizes a DO-203AB (DO-5) axial leaded package, suitable for through-hole mounting on printed circuit boards. It operates within a junction temperature range of -65°C to +175°C, ensuring reliability in demanding thermal environments. Key electrical characteristics include a low forward voltage drop at rated current and robust surge current handling capabilities defined by its physical construction.

Single Diodes Feature Summary

• High-power silicon rectification with 70A average forward current capacity
• Wide operating junction temperature range from -65°C to +175°C
• Robust DO-203AB axial leaded package for secure mechanical mounting

Single Diodes Applications

• High-current DC power supply rectification
• Battery charging circuits requiring high surge tolerance
• Industrial power conversion systems

Single Diodes Procurement Notes

Verify the manufacturer source carefully, as the 1N2128 designation has been produced by multiple vendors including Microsemi and Vishay. Confirm that the specific lot or revision matches the required electrical tolerances for your design. Ensure the package type is strictly DO-203AB/DO-5 to guarantee compatibility with existing footprints. Request detailed datasheets from the specific supplier to confirm peak reverse voltage and forward voltage specifications before finalizing procurement.

Single Diodes Selection Notes

Select this component when designing circuits that require high continuous current handling up to 70A with a 50V reverse voltage block. The wide temperature range makes it suitable for industrial or automotive environments where ambient temperatures fluctuate significantly. Consider the thermal resistance of the DO-5 package and ensure adequate heatsinking or airflow if operating near maximum ratings. Compare forward voltage drop characteristics against alternative manufacturers if efficiency is critical.

Single Diodes Part Context

The 1N2128 belongs to the family of standard recovery silicon power rectifiers. Historically associated with Microsemi Corporation, these components are widely used in legacy and modern industrial designs. The part number follows the JEDEC numbering system for general-purpose rectifiers. Similar parts in this category often share the DO-5 package but vary in current and voltage ratings. Understanding the specific manufacturer's datasheet is essential due to variations in historical production batches.

Single Diodes Replacement Considerations

Direct substitutes include the 1N2128A from various manufacturers, which shares identical electrical ratings. Verify pinout compatibility and package dimensions (DO-203AB) when swapping vendors. Ensure replacement parts meet the same 70A current and 50V reverse voltage specifications.