1N5518A/TR

Overview

The 1N5518A/TR is a single Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 3.3 V with a 5% tolerance and operates at a test current of 20 mA. The device dissipates up to 500 mW of power and exhibits a maximum reverse leakage current of 5 µA. Its Zener impedance is specified at 26 Ohms. The component utilizes an axial DO-204AH (DO-35) through-hole package and supports a wide operating temperature range from -65 °C to +175 °C junction temperature.

Feature Summary

• Provides stable voltage regulation via Zener breakdown characteristics in the reverse bias region.
• Capable of operation across an extended industrial temperature range suitable for harsh environments.
• Utilizes an axial leaded package configuration for reliable through-hole mounting.

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• Biasing networks within analog signal processing equipment

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm exact electrical tolerances and testing criteria. Ensure the procurement channel provides valid traceability records. Confirm that the reel packaging format aligns with automated assembly requirements. Validate RoHS compliance status prior to integration into regulated assemblies.

Selection Notes

Select this component when a 3.3 V reference point is required with moderate precision. Evaluate thermal management needs as the device handles 500 mW dissipation. Consider the axial package constraints regarding board layout density. Compare leakage specifications against sensitive input requirements to ensure circuit stability under varying temperature conditions.

Part Context

This part belongs to the standard 1N55xx series of glass-passivated Zener diodes produced by Microchip Technology. The series offers various voltage options within a consistent axial package form factor. These components are widely utilized in general-purpose electronics for their reliability and established performance characteristics in voltage regulation tasks.

Replacement Considerations

Consult official substitution guides for compatible equivalents. Verify pinout compatibility and thermal resistance parameters before implementing any alternative devices in existing designs.