1N5309-1E3/TR

Overview

The Microchip Technology 1N5309-1E3/TR is a current regulator diode designed for stable constant-current applications. It operates with a maximum voltage of 100V and provides a regulated current of 3.3mA at a power dissipation of 500mW. The device features an operating temperature range from -65°C to 175°C TJ, ensuring reliability in harsh environments. Packaged in a DO-204AA (DO-7) axial through-hole format, it is supplied in tape and reel quantities suitable for automated assembly processes.

Feature Summary

• Maintains constant current output across varying load conditions
• Capable of operation in extreme temperature environments up to 175°C
• Utilizes standard axial through-hole packaging for easy integration

Applications

• Biasing circuits for transistors and LEDs
• Constant current sources for sensor interfaces
• Protection circuits requiring fixed current limiting

Procurement Notes

Verify the specific suffix -1E3/TR against official Microchip documentation to confirm lead-free status and tape-and-reel packaging configuration. Ensure compatibility with existing PCB footprints for DO-7 packages before procurement. Cross-reference datasheet revisions to validate electrical parameters match design requirements.

Selection Notes

Select this component when a simple, passive constant current solution is required without active control loops. Consider the 3.3mA limit and 100V breakdown voltage to ensure they align with the target circuit's operational range. Evaluate thermal management needs given the 500mW power rating and high-temperature capability.

Part Context

This part belongs to the 1N5309 series of current regulator diodes manufactured by Microchip Technology. It serves as a specialized semiconductor device distinct from standard rectifiers or Zener diodes, focusing specifically on maintaining a steady current flow regardless of voltage fluctuations within its specified limits.

Replacement Considerations

Consult official Microchip substitution guides for compatible equivalents. Verify that any alternative maintains identical current regulation characteristics, voltage ratings, and package dimensions to ensure seamless replacement in existing designs.