1N5290UR-1

Overview

The Microchip Technology 1N5290UR-1 is a current regulator diode housed in a DO-213AB (MELF, LL41) surface-mount package. It provides a nominal regulating current of 0.47 mA with a standard tolerance of ±10%, ranging from 0.423 mA to 0.517 mA. The device operates at a maximum working peak voltage of 100 V and dissipates up to 500 mW of power. Electrical characteristics include a minimum regulator impedance of 2.7 MΩ and a minimum knee impedance of 0.75 MΩ. The component supports an operating temperature range from -65 °C to +150 °C.

Feature Summary

• JEDEC registered surface mount equivalent of the 1N5283 through 1N5314 series
• High source impedance for stable current regulation
• Internal metallurgical bond construction
• Radiation hard design

Applications

• Current limiting circuits
• Constant current sources
• Biasing networks for active components

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm qualification level and compliance status. Ensure that the procurement channel sources directly from authorized distributors or the manufacturer to guarantee authenticity. Confirm that the delivered part matches the exact JAN, JANTX, JANTXV, or commercial grade requirements specified for the application.

Selection Notes

Select this component when a surface-mount solution is required for constant current applications within the 0.47 mA range. Verify that the circuit design accommodates the 100 V peak operating voltage limit. Consider the thermal resistance and derating requirements if the ambient temperature exceeds 125 °C. Ensure the mounting surface coefficient of expansion matches the device specifications to prevent mechanical stress.

Part Context

This device belongs to the 1N5283UR-1 through 1N5314UR-1 family of 0.5 watt current regulators manufactured by Microchip Technology. These devices serve as surface-mount equivalents to axial-leaded current regulator diodes. The series offers a wide selection of currents from 0.22 mA to 10.0 mA in standard 10% tolerances, providing a counterpart to Zener diodes which regulate voltage over a broad current range.

Replacement Considerations

The 1N5290UR-1 is the surface-mount equivalent of the 1N5290 axial-leaded diode. For direct replacement in surface-mount designs, verify compatibility with other parts in the 1N5283UR-1 to 1N5314UR-1 series that share the same 0.47 mA nominal current rating.