1N5290

Overview

The Microchip Technology 1N5290 is a current regulator diode designed for through-hole mounting in the DO-7 (DO-204AA) axial leaded package. It provides a regulated current of 517 µA with a maximum voltage rating of 100 V and a power dissipation capacity of 500 mW. The device features a maximum limiting voltage of 1.05 V and operates within a junction temperature range of -65°C to 175°C. This component serves as a constant current source, functioning similarly to Zener diodes but regulating current over a broad voltage range rather than voltage over a broad current range.

Feature Summary

• Provides stable current regulation across a wide operating voltage range
• Utilizes a robust DO-7 axial leaded package suitable for high-temperature environments
• Functions as a constant current source counterpart to voltage-regulating Zener diodes

Applications

• Constant current biasing for semiconductor lasers and photodiodes
• Current limiting protection in electronic circuits
• Reference current sources in analog signal processing systems

Procurement Notes

Verify the specific suffix (e.g., /TR, -1) against the official datasheet to confirm packaging type and qualification level. Ensure the required current tolerance and voltage ratings match the design specifications before ordering. Check for military-grade variants if environmental compliance or extended temperature ranges are mandatory for the application.

Selection Notes

Select this component when a precise low-current regulation is required without complex circuitry. Compare the 517 µA output against other series members like the 1N5283 or 1N5291 if different current levels are needed. Confirm that the load voltage remains within the 100 V maximum limit to ensure proper regulation and prevent device damage.

Part Context

The 1N5290 belongs to the popular 1N5283-1 thru 1N5314-1 series of 0.5 watt current regulators manufactured by Microchip Technology. This series offers a selection of currents ranging from 0.22 mA to 4.7 mA in standard 10% tolerances. These devices are widely used in applications requiring simple, reliable constant current sources in compact axial packages.

Replacement Considerations

Direct substitutes within the same family include the JAN1N5290-1/TR for qualified versions. Other current levels in the series such as 1N5289 or 1N5291 may be considered if current adjustment is permissible. Verify pinout compatibility and thermal characteristics when substituting with generic equivalents.