1N5522D

Overview

The Microchip Technology 1N5522D is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 4.7 V with a tight tolerance of ±1%. The device is rated for a maximum power dissipation of 500 mW and utilizes a DO-204AH (DO-35) axial through-hole package. Key electrical characteristics include a maximum Zener impedance of 22 Ohms and a reverse leakage current of 2 µA at 2 V. The forward voltage is specified as 1.1 V at 200 mA, and it operates within a junction temperature range of -65°C to 175°C.

Feature Summary

• Provides precise voltage regulation with a nominal Zener voltage of 4.7 V and a tight ±1% tolerance.
• Engineered for high thermal stability with an extended operating junction temperature range up to 175°C.
• Constructed in a robust DO-204AH (DO-35) axial leaded package suitable for through-hole mounting.

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in electronic systems
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as 1N5522D/TR may exist with identical electrical parameters but different packaging configurations. Confirm that the required tolerance and power ratings align with the design specifications before procurement. Cross-reference official datasheets to ensure compatibility with existing assembly processes and environmental compliance standards.

Selection Notes

Select this component when a low-voltage reference near 4.7 V is required with high precision. The ±1% tolerance makes it suitable for applications demanding strict voltage accuracy. Ensure the circuit design accounts for the 500 mW power dissipation limit and the 22 Ohm impedance characteristic to maintain performance under varying load conditions.

Part Context

This part belongs to the standard Zener diode family manufactured by Microchip Technology. It is commonly used in discrete semiconductor applications where reliable voltage regulation is critical. The DO-204AH package provides a compact solution for through-hole PCB designs, ensuring mechanical stability and ease of integration into various electronic assemblies.

Replacement Considerations

The 1N5522D/TR is documented as a parameter-equivalent substitute from Microchip Technology. Verify that any alternative components match the 4.7 V Zener voltage, ±1% tolerance, and 500 mW power rating to ensure functional compatibility without redesigning the host circuit.