CD5521B

Single Zener Diodes Overview

The CD5521B is a single Zener diode manufactured by Microchip Technology, designed for surface-mount applications. It features a nominal Zener voltage of 4.3 V with a tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and exhibits a maximum Zener impedance of 18 Ohms. Electrical characteristics include a reverse leakage current of 3 µA at 1.5 V and a forward voltage of 1.5 V at 200 mA. The component operates within a temperature range of -65°C to +175°C and is supplied in a die package configuration.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation through a single Zener junction structure
• Features silicon dioxide protection for complete junction integrity
• Supports compatibility with standard wire bonding and die attach techniques

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in semiconductor assemblies
• Biasing networks in high-temperature electronic systems

Single Zener Diodes Procurement Notes

Verify the specific datasheet version and electrical test conditions prior to integration. Confirm that the die package format aligns with the intended assembly process, as this component utilizes a bare die configuration rather than a standard encapsulated footprint. Ensure thermal management strategies account for the 500 mW power rating under operational loads.

Single Zener Diodes Selection Notes

Select this component when a compact, high-reliability voltage reference is required for space-constrained designs. The wide operating temperature range makes it suitable for harsh environments. Consider the die form factor during PCB layout planning, as it requires specific mounting and bonding infrastructure compared to leaded or surface-mount packaged alternatives.

Single Zener Diodes Part Context

This part belongs to the CD55xxB series of Zener diodes from Microchip Technology. These devices are electrically equivalent to the 1N5518B through 1N5546B series but are provided in a die format. The series is designed for applications demanding robust performance and compatibility with advanced packaging technologies used in integrated circuit manufacturing.

Single Zener Diodes Replacement Considerations

Publicly confirmed substitutes include parts within the 1N5518B through 1N5546B series equivalents, provided the receiving system can accommodate the die package format and associated assembly requirements.