1N5283UR-1

Overview

The Microchip Technology 1N5283UR-1 is a silicon current regulator diode housed in the DO-213AB (MELF) surface-mount package. It provides a regulated current of 0.22 mA with standard 10% tolerance. The device supports a maximum peak operating voltage of 100 V and a maximum limiting voltage of 1 V. Rated for a power dissipation of 500 mW, it operates within a temperature range of -65 °C to +175 °C. Key electrical parameters include a minimum dynamic impedance of 25 mOhms and a minimum knee impedance of 2.75 mOhms.

Feature Summary

• Provides stable constant current regulation over a broad input voltage range without external components.
• Features internal metallurgical bonding for enhanced reliability in harsh environments.
• Utilizes a hermetically sealed glass MELF package suitable for high-reliability applications.

Applications

• Precision sensor array biasing requiring stable excitation currents.
• LED driver circuits for simple constant current control.
• Inrush current limiting and power-on surge protection.
• Analog circuit biasing for operational amplifiers and comparators.

Procurement Notes

Verify the specific suffix UR-1 against the official datasheet to confirm the package type and qualification level. Ensure the procurement source provides valid traceability documentation, as this component may be subject to military or aerospace qualification standards. Confirm RoHS compliance status if required by the target assembly process.

Selection Notes

Select the 1N5283UR-1 when a precise 0.22 mA current is needed in a compact surface-mount form factor. Compare its 100 V breakdown capability against lower-voltage alternatives if the application involves higher supply rails. Consider the thermal derating requirements at elevated temperatures above 175 °C junction limits.

Part Context

This component belongs to the 1N5283 series of current regulator diodes, which are functionally similar to Zener diodes but regulate current instead of voltage. The series spans from 0.22 mA to 4.7 mA, offering a standardized solution for constant current applications across various industries including automotive and industrial electronics.

Replacement Considerations

Direct substitutes include other manufacturers' equivalents of the 1N5283 series in the DO-213AB package. Verify that any replacement maintains the same 0.22 mA nominal current and 100 V maximum voltage rating to ensure circuit compatibility.