1N5287UR-1

Overview

The Microchip Technology 1N5287UR-1 is a current regulator diode designed for surface-mount applications. It operates within the DO-213AB-2 package, commonly known as SOD-80C. The device regulates a nominal current of 363 µA with a maximum peak operating voltage of 100 V and a maximum limit voltage of 1 V. It features a power dissipation rating of 500 mW and supports an extended operating temperature range from -65°C to +175°C. This component provides stable current regulation across a broad voltage range, serving as a counterpart to Zener diodes in compact surface-mount designs.

Feature Summary

• Provides constant current regulation over a wide voltage range
• High source impedance for stable performance
• Suitable for harsh environments with extended temperature capability

Applications

• Constant current sources for LED drivers
• Biasing circuits for transistors and active components
• Current limiting protection in sensitive electronic circuits

Procurement Notes

Verify the specific suffix UR-1 against official Microchip documentation to confirm the surface-mount package type and manufacturing lot details. Ensure compliance with project requirements regarding RoHS status and military qualification levels if applicable. Cross-reference the manufacturer part number with distributor listings to confirm availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when a precise low-current regulation value near 363 µA is required in a surface-mount form factor. Consider the 100 V reverse voltage rating and 500 mW power dissipation limits during thermal design. Compare with through-hole equivalents like the 1N5287-1 if board space allows, noting that the UR-1 variant offers higher temperature tolerance and smaller footprint suitable for automated assembly processes.

Part Context

The 1N5287UR-1 belongs to the popular 1N5283-1 through 1N5314-1 series of 0.5 W current regulators manufactured by Microchip. These devices are available in various qualification levels including JAN, JANTX, and JANTXV. The UR-1 designation specifically indicates the round-end surface-mount package variant, distinguishing it from axial-leaded versions while maintaining similar electrical characteristics within the family.

Replacement Considerations

Direct substitutes include other 1N5287 variants such as JANTXV1N5287UR-1 or CD5287, provided the package and electrical parameters match. Verify that alternative sources offer the same DO-213AB-2 footprint and 363 µA regulation current. Ensure any replacement maintains the required high-temperature operation and voltage ratings.