1N5309-1E3

Overview

The Microchip Technology 1N5309-1E3 is a current regulator diode designed for stable current control in electronic circuits. It operates with a maximum voltage of 100V and provides a regulated current of 3.3mA. The device supports a maximum power dissipation of 500mW and functions within a junction temperature range of -65°C to 175°C. It utilizes an axial DO-204AA (DO-7) package suitable for through-hole mounting. This component is part of the broader 1N5309 series, offering consistent performance for applications requiring precise current limiting or regulation.

Feature Summary

• Provides stable current regulation across varying load conditions
• Capable of operating in extreme temperature environments up to 175°C
• Utilizes a robust axial leaded package for reliable through-hole integration

Applications

• Current limiting in sensor biasing circuits
• Constant current sources for LED drivers
• Reference current generation in analog signal processing

Procurement Notes

Verify the specific suffix -1E3 against the manufacturer's latest datasheet to confirm compliance with environmental directives such as RoHS. Ensure that the axial DO-7 package dimensions match the target PCB footprint. Cross-reference the part number with authorized distributors to confirm availability and authenticity, as supply chain variations may exist for military-grade variants within the same family.

Selection Notes

Select this component when a fixed current of approximately 3.3mA is required without complex feedback loops. Consider the 100V breakdown voltage limit to ensure it exceeds the maximum circuit potential. Evaluate the thermal management requirements given the 500mW power rating and high-temperature capability. Compare against surface-mount alternatives if space constraints dictate a change in package type.

Part Context

This part belongs to the 1N5309 series of current regulator diodes manufactured by Microchip Technology. The series includes various current ratings and voltage specifications tailored for different circuit needs. The 1N5309 specifically targets applications needing moderate current stability. It shares design principles with other diodes in the 1N5283 to 1N5314 range, differing primarily in regulated current values and packaging options.

Replacement Considerations

Direct substitutes include other 1N5309 variants from different manufacturers, provided they meet the 3.3mA current and 100V voltage specifications. Verify pinout compatibility for axial packages. Alternative current regulator diodes with similar ratings may require circuit adjustments if their dynamic resistance characteristics differ significantly.