1N2129

Single Diodes Overview

The Microchip Technology 1N2129 is a high-voltage glass-passivated junction rectifier diode designed for general-purpose applications. It features a maximum repetitive peak reverse voltage of 500 volts and a continuous forward current rating of 1.0 ampere. The device utilizes a DO-41 axial leaded package, providing robust mechanical stability for through-hole mounting. Key electrical characteristics include a maximum RMS voltage of 350 volts and a non-repetitive peak forward surge current capability of 30 amperes for an 8.3 ms single half-sine-wave impulse. These specifications ensure reliable operation in standard power supply circuits.

Single Diodes Feature Summary

• Glass-passivated junction construction ensures stable performance under varying thermal conditions.
• Axial leaded package design facilitates easy integration into printed circuit boards.
• High surge current capability supports transient load handling in rectifier applications.

Single Diodes Applications

• General-purpose rectification in AC to DC power conversion circuits
• Protection against reverse polarity in electronic systems
• Freewheeling diodes in inductive load switching applications

Single Diodes Procurement Notes

Verify the specific manufacturer lot code and date code on the component marking to ensure authenticity and traceability. Confirm that the packaging matches the required reel or tube specifications if automated assembly is planned. Cross-reference the datasheet revision with the procurement documentation to ensure compliance with current RoHS directives and material declarations provided by the supplier.

Single Diodes Selection Notes

Select this component when a 500V reverse voltage rating and 1A continuous current are required in a standard axial package. Ensure the operating temperature range aligns with the specified -65°C to +175°C junction temperature limits. Consider the forward voltage drop at rated current for efficiency calculations in low-voltage output stages where conduction losses may impact overall system performance.

Single Diodes Part Context

This diode belongs to the standard rectifier family produced by Microchip Technology, formerly part of the General Semiconductor portfolio. It serves as a legacy replacement for older industry-standard parts in existing designs. The component is widely used in industrial equipment and consumer electronics where reliable, cost-effective rectification is necessary without requiring specialized fast-recovery characteristics.

Single Diodes Replacement Considerations

Direct replacements must match the 500V VRRM, 1.0A IF, and DO-41 package dimensions. Verify pinout compatibility and thermal resistance values. Substitutes should offer equal or superior surge current ratings and reverse leakage characteristics to maintain circuit reliability without redesigning the PCB footprint.

Single Diodes FAQ

What is the maximum junction temperature for the 1N2129?

The maximum storage and operating junction temperature is 175°C.

Does the 1N2129 have a fast recovery time?

No, it is a standard rectifier diode with a typical reverse recovery time of 0.5 microseconds, not optimized for high-frequency switching.