1N5522B

Overview

The Microchip Technology 1N5522B is a low voltage avalanche Zener diode rated at 0.5 W, housed in a hermetically sealed axial-lead glass DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 4.7 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and features a maximum forward voltage of 1.1 V at 200 mA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance for high-frequency applications
• Inherently radiation hard and non-sensitive to electrostatic discharge

Applications

• Voltage regulation over broad operating currents
• Reference voltage generation in precision circuits
• Protection against overvoltage transients

Procurement Notes

Verify the specific suffix requirements for your application. The base part number indicates commercial grade availability. Military qualifications such as JAN, JANTX, or JANTXV require the addition of the '-1' metallurgical bond suffix alongside the 'B' tolerance designation. Confirm RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component when a 4.7 V reference with ±5% accuracy is needed in an axial leaded package. Ensure the power dissipation rating of 0.5 W aligns with your circuit's thermal design. Consider the -1 suffix if radiation hardness or military reliability specifications are mandatory for the deployment environment.

Part Context

This component belongs to the 1N5518B through 1N5546B series of low voltage avalanche Zener diodes manufactured by Microchip Technology. The series covers a voltage selection from 3.3 V to 33 V. These devices are JEDEC registered and designed for robust performance in demanding electronic environments.

Replacement Considerations

Direct replacements must match the 4.7 V nominal voltage, 0.5 W power rating, and DO-35 axial package. Verify that any substitute maintains the same ±5% tolerance and electrical characteristics defined in the original datasheet.