1N5287/TR

Overview

The Microchip Technology 1N5287/TR is a current regulator diode designed for applications requiring stable current limiting. It features a maximum regulated current of 363 µA and supports a peak operating voltage up to 100 V. The device has a maximum power dissipation of 475 mW and operates within a temperature range of -65°C to +175°C. Packaged in the DO-7 axial leaded format, it provides high source impedance for effective current regulation.

Feature Summary

• Provides constant current regulation over a broad voltage range
• High source impedance ensures stable current output
• Suitable as a counterpart to Zener diodes for current-based regulation

Applications

• Current limiting circuits
• Constant current sources
• Protection against overcurrent conditions

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging when ordering. Confirm RoHS compliance status with the manufacturer as military variants may differ. Ensure the DO-7 package dimensions match the target PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when a fixed low-current limit between 300 µA and 400 µA is required. Compare the 100 V breakdown rating against circuit voltage spikes. Consider the DO-7 through-hole package if surface mount options are not feasible for the assembly process.

Part Context

This part belongs to the 1N5283-1 through 1N5314-1 series of 0.5 W current regulators. These devices offer standard 10% tolerance currents ranging from 0.22 mA to 4.7 mA. The series is widely used for its reliability in axial-leaded packages similar to traditional Zener diodes.

Replacement Considerations

Check datasheets for other parts in the 1N528x series for different current values. Verify pinout compatibility for direct replacement. Ensure thermal management capabilities match the original design constraints.