1N5311-1/TR

Overview

The Microchip Technology 1N5311-1/TR is a current regulator diode designed for stable current control in electronic circuits. It operates with a maximum peak working voltage of 100 V and provides a regulated current of 3.96 mA. The device features a power dissipation rating of 500 mW, making it suitable for low-power applications. It utilizes a DO-7-2 through-hole package configuration. The component supports an operating temperature range from -65 °C to +175 °C, ensuring reliability under extreme thermal conditions. This specific variant includes the '/TR' suffix indicating tape and reel packaging for automated assembly processes.

Feature Summary

• Provides constant current regulation independent of voltage variations within specified limits
• Capable of operation across a wide industrial temperature range up to 175 °C
• Utilizes a standard through-hole axial leaded package for easy circuit board integration

Applications

• Biasing networks for transistors and integrated circuits requiring stable current sources
• LED driver circuits where constant current regulation is necessary for consistent brightness
• Protection circuits limiting current flow to sensitive components against overcurrent conditions

Procurement Notes

Verify the exact part number including the /TR suffix to confirm tape and reel packaging specifications. Ensure compatibility with the DO-7-2 package footprint on the target printed circuit board. Confirm that the 3.96 mA regulated current meets the design requirements for the intended application load. Check for any specific environmental compliance certifications required by the end product regulations.

Selection Notes

Select this component when a fixed current source is needed rather than a voltage reference. Compare the 3.96 mA output against other variants in the 1N531x series if different current levels are required. Consider the 500 mW power dissipation limit to ensure adequate heat sinking or airflow in enclosed designs. Verify that the 100 V maximum voltage rating exceeds the potential voltage drop across the diode in the specific circuit topology.

Part Context

This part belongs to the 1N531x family of current regulator diodes manufactured by Microchip Technology. These devices are solid-state alternatives to traditional Zener-based current sources, offering better stability and simpler implementation. The family includes various current ratings such as 3.63 mA and 4.29 mA for different application needs. The 1N5311-1 specifically targets applications requiring precise 3.96 mA regulation.

Replacement Considerations

Direct substitutes include other 1N5311 variants from different manufacturers if pinout and electrical parameters match exactly. Cross-reference with JAN1N5311-1 for military-grade equivalents if higher reliability standards are required. Ensure any replacement maintains the same DO-7-2 package and 3.96 mA current rating to avoid circuit redesign.