1N5290UR-1E3

Overview

The Microchip Technology 1N5290UR-1E3 is a surface-mount current regulator diode housed in the DO-213AB (MELF) package. It provides a nominal regulating current of 0.47 mA with standard tolerances ranging from 0.423 mA to 0.517 mA at a test voltage of 25 V. The device supports a maximum working peak voltage of 100 V and handles up to 500 mW of steady-state power dissipation at an ambient temperature of +125 °C. Operating junction temperatures range from -65 °C to +150 °C, ensuring stable performance across wide environmental conditions.

Feature Summary

• JEDEC registered surface mount equivalent of the 1N5283 through 1N5314 series
• Leadless glass case construction with internal metallurgical bond
• High source impedance for effective current regulation
• Inherently radiation hard design

Applications

• Current limiting circuits requiring broad operating voltage ranges
• Temperature-compensated reference designs utilizing specific thermal coefficients
• Biasing networks for semiconductor devices needing constant current sources

Procurement Notes

Verify that the ordering suffix matches the required qualification level, as commercial versions differ from military specifications. Confirm RoHS compliance status if lead-free terminals are mandatory for the assembly process. Ensure the MELF package dimensions align with the intended PCB footprint and soldering profile requirements.

Selection Notes

Select this component when a surface-mount solution is required for current regulation between 0.22 mA and 10.0 mA. Consider the 10% standard tolerance and the specific knee voltage characteristics for precision applications. Evaluate the thermal resistance and power derating curves if operation exceeds +125 °C ambient conditions.

Part Context

This part belongs to the 1N5283UR-1 through 1N5314UR-1 family of 0.5 watt current regulators. It serves as the surface-mount counterpart to the axial-leaded 1N5283-1 through 1N5314-1 series. The DO-213AB package utilizes a double-plug internal bond connection to support its function as a current limiter.

Replacement Considerations

The axial-leaded 1N5290-1 is the direct functional equivalent within the same electrical specification family. For surface-mount replacements, verify compatibility with other manufacturers' DO-213AB current regulator diodes having identical nominal current and voltage ratings.