1N5309 TR TIN/LEAD

Overview

The Central Semiconductor Corp 1N5309 TR TIN/LEAD is a current regulator diode designed for through-hole mounting in the DO-204AA (DO-7) axial leaded package. It provides a regulated current of 3.3 mA with a maximum voltage rating of 100 V and a power dissipation capacity of 500 mW. The device operates within a junction temperature range of -65°C to +175°C, ensuring stability across demanding thermal environments. Key electrical characteristics include a maximum limit voltage of 2.25 V and a reverse leakage current of 5 µA at 100 V. This component is suitable for applications requiring constant current sources or biasing circuits.

Feature Summary

• Provides stable constant current regulation without external components
• Capable of operating at high junction temperatures up to 175°C
• Features low reverse leakage current for efficient performance

Applications

• Constant current sources for LED driving
• Biasing circuits for transistors and integrated circuits
• Current limiting protection in electronic systems

Procurement Notes

Verify the specific ordering suffix 'TR' against the manufacturer's official documentation to confirm tape-and-reel packaging versus bulk supply. Ensure the tin/lead finish meets project requirements for solderability and regulatory compliance. Cross-reference the Mouser number 610-1N5309TR-TL or equivalent distributor identifiers to validate exact stock availability and manufacturing lot details before finalizing procurement orders.

Selection Notes

Select this component when a fixed 3.3 mA current source is required within a 100 V potential difference. Consider the DO-7 package dimensions for PCB layout constraints. Evaluate the 500 mW power dissipation limit to ensure adequate thermal management under maximum operating conditions. Compare against alternative current regulator diodes if tighter tolerance or different current values are necessary for the specific circuit design.

Part Context

This part belongs to the standard 1N53xx series of current regulator diodes manufactured by Central Semiconductor. These devices utilize silicon planar technology to provide reliable current regulation. The 1N5309 variant specifically targets the 3.3 mA regulation point, distinguishing it from other series members with different current ratings. It serves as a discrete solution for current control tasks traditionally handled by more complex active circuits.

Replacement Considerations

Publicly confirmed substitute part numbers for the 1N5309 include the Microchip Technology 1N5309 and generic equivalents such as the 1N5309B. Verify pinout compatibility and electrical parameter tolerances before substitution. Alternative manufacturers may offer similar axial-leaded current regulators, but functional equivalence must be validated against the original datasheet specifications.