1N5289/TR

Overview

The Microchip Technology 1N5289/TR is a current regulator diode designed for stable current limiting applications. It operates with a maximum anode-to-cathode voltage of 100V and dissipates up to 500mW of power. The device regulates current at a maximum value of 473µA, with a maximum limit voltage of 1.05V. Packaged in a DO-7 axial leaded format suitable for through-hole mounting, it supports a wide junction temperature range from -65°C to +175°C. This component is RoHS compliant and classified under EAR99 export controls.

Feature Summary

• Provides constant current regulation for circuit protection and biasing
• Operates reliably across extended industrial temperature ranges
• Utilizes standard through-hole axial packaging for easy integration

Applications

• Current limiting in LED driver circuits
• Biasing elements for transistor amplifiers
• Protection against overcurrent conditions in sensitive electronics

Procurement Notes

Verify the specific suffix /TR indicates tape and reel packaging when ordering. Confirm RoHS3 compliance status for environmental requirements. Check the latest datasheet for any product change notifications regarding assembly sites or labeling updates. Ensure the DO-7 package dimensions match the target PCB footprint constraints before finalizing procurement.

Selection Notes

Select this component when a fixed low-current regulation around 473µA is required. Ensure the circuit voltage does not exceed the 100V maximum rating. Consider the 500mW power dissipation limit relative to ambient temperature. Verify that the axial leaded form factor fits the mechanical design constraints compared to surface mount alternatives.

Part Context

This part belongs to the 1N528x series of current regulator diodes manufactured by Microchip Technology. It shares functional similarities with other devices in the series but differs in regulated current values. The /TR suffix specifically denotes the reel packaging format, distinguishing it from bulk or tray variants within the same electrical specification family.

Replacement Considerations

Direct substitutes include other 1N5289 variants from different manufacturers if pin compatibility is maintained. For modified packaging, consider JAN1N5288UR-1 for surface mount options, though current ratings may differ. Always verify electrical parameters against the original design requirements before substitution.