1N5312

Overview

The Microchip Technology 1N5312 is a current regulator diode designed for through-hole mounting. It provides a regulated current of 4.29 mA with a maximum voltage rating of 100 V and a power dissipation capacity of 500 mW. Classified under Diodes & Rectifiers, this component utilizes the DO-35 or similar axial leaded package to ensure reliable performance in electronic circuits requiring stable current regulation.

Feature Summary

• Provides precise constant current regulation for circuit stability
• Capable of handling high reverse voltages up to 100 V
• Suitable for through-hole assembly processes

Applications

• Current limiting in LED driver circuits
• Biasing active components such as transistors and FETs
• Protection of sensitive inputs against overcurrent conditions

Procurement Notes

Verify the specific package variant and tolerance class required for your design before ordering. Confirm that the 500 mW power rating aligns with your thermal management strategy. Ensure the 4.29 mA current specification meets the load requirements. Check for any specific manufacturing date codes if long-term supply continuity is critical for the project timeline.

Selection Notes

Select this component when a fixed current source is needed without complex feedback loops. The 100 V breakdown voltage allows for use in higher voltage rails compared to lower-rated regulators. Consider the 500 mW dissipation limit to determine if heat sinking or derating is necessary in enclosed environments. Compare against other JANTX or standard military-grade equivalents if radiation hardness is not a primary constraint.

Part Context

This part belongs to the standard Zener/Current Regulator Diode family from Microchip Technology. It is often used in conjunction with resistors to create simple, low-cost constant current sources. The 1N53xx series designation typically indicates a specific current range within the broader category of axial-lead current regulators produced by various semiconductor manufacturers.

Replacement Considerations

Direct substitutes include other 4.29 mA current regulator diodes in the DO-35 package. Verify that replacement parts match the 100 V maximum voltage and 500 mW power dissipation ratings. Check for identical pinout configurations to ensure compatibility with existing PCB footprints.