1N5303UR-1

Overview

The 1N5303UR-1 is a current regulator diode manufactured by Microchip Technology, designed for surface-mount applications. It operates within a maximum peak working voltage of 100 V and maintains a maximum regulator current of 1.76 mA. The device features a power dissipation rating of 475 mW and utilizes the DO-213AB-2 package. It supports an extended operating temperature range from -65 °C to +175 °C, ensuring reliability in demanding environments.

Feature Summary

• Provides stable current regulation with defined dynamic and knee impedance characteristics.

Applications

• Constant current sources for LED driving circuits
• Battery charging current limiting
• Voltage reference biasing

Procurement Notes

Verify the specific suffix UR-1 against official Microchip documentation to confirm surface-mount configuration and package type. Ensure compliance with RoHS directives if required by the target application. Cross-reference datasheet parameters such as dynamic impedance and operating temperature range prior to integration.

Selection Notes

Select this component when a compact surface-mount solution is required for precise current regulation. Evaluate the 1.76 mA output current against circuit load requirements. Confirm that the 100 V breakdown voltage exceeds the maximum expected reverse voltage in the design.

Part Context

This part belongs to the 1N53xx series of current regulator diodes produced by Microchip Technology. The series offers various fixed current options packaged in standard forms. The UR-1 designation typically indicates a specific surface-mount variant within this family.

Replacement Considerations

Direct substitutes include other 1N5303 variants from different manufacturers, provided they match the 1.76 mA current, 100 V voltage, and DO-213AB package dimensions. Verify electrical tolerances and thermal ratings before substitution.