1N5309/TR

Overview

The Microchip Technology 1N5309/TR is a current regulator diode designed for surface-mount applications. It operates within the DO-213AB-2 package, also known as SOD-80C, and provides a regulated current of 3.3 mA with a maximum voltage rating of 100 V. The device features a power dissipation capacity of 500 mW and functions across an extended temperature range from -65°C to +175°C junction temperature. This component utilizes a round-end SMT construction suitable for automated assembly processes.

Feature Summary

• Provides stable constant current regulation without external components
• Supports high-temperature operation up to 175°C junction temperature
• Utilizes compact surface-mount packaging for space-constrained designs

Applications

• Biasing circuits for transistors and LEDs
• Current limiting in sensor interfaces
• Reference current sources in analog signal processing

Procurement Notes

Verify the specific suffix configuration against official Microchip documentation to ensure compatibility with required environmental standards and packaging formats. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as regulatory markings may vary by production batch and region.

Selection Notes

Select this component when a fixed current source is required in a surface-mount layout. Ensure the circuit design accommodates the 100 V maximum voltage rating and 500 mW power dissipation limits. Verify that the operating temperature range aligns with the system's thermal requirements, particularly regarding the -65°C to +175°C junction specification.

Part Context

The 1N5309 series belongs to Microchip's family of current regulator diodes, offering reliable performance in discrete semiconductor applications. The UR-1 suffix typically denotes the surface-mount variant in the DO-213AB package, distinguishing it from through-hole axial versions like the standard 1N5309. This series is engineered for durability in demanding electronic environments.

Replacement Considerations

Cross-reference with other 1N5309 variants such as JANTX1N5309UR-1 for radiation-hardened requirements. Verify pinout and package dimensions against alternative suppliers' SOD-80C equivalents to ensure mechanical fit and electrical equivalence in existing designs.