MMSZ5254B-7

Single Zener Diodes Overview

The MMSZ5254B-7 is a surface mount Zener diode manufactured by Diodes Incorporated, designed for general-purpose voltage regulation. It operates within the SOD123 package and provides a nominal Zener voltage of 27V with a tolerance range of 25.65V to 28.35V. The device dissipates up to 500mW at an ambient temperature of +25°C and 370mW when mounted on an FR-4 PCB. Electrical characteristics include a maximum Zener impedance of 41 Ohms at a test current of 5.0mA and a maximum reverse leakage current of 0.1µA at 21V.

Single Zener Diodes Feature Summary

• Totally lead-free and fully RoHS compliant construction
• Halogen and antimony free "Green" device configuration
• Qualified to AEC-Q101 standards for high reliability applications
• Ideally suited for automated assembly processes

Single Zener Diodes Applications

• General purpose voltage regulation circuits
• Medium current protection applications
• Automotive electronics requiring high reliability components

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required qualification level and packaging format. The standard commercial version utilizes the -7-F suffix for tape and reel packaging in quantities of 3,000 units. Automotive qualified variants are available with specific suffixes. Confirm compliance requirements such as halogen-free status and moisture sensitivity levels before finalizing procurement specifications.

Single Zener Diodes Selection Notes

Select this component for applications requiring a 27V reference or clamp within the SOD123 footprint. Ensure thermal management accounts for the 338°C/W junction-to-ambient resistance when operating near maximum power dissipation limits. Verify that the 5.0mA test current aligns with the target circuit bias conditions to maintain accurate voltage regulation performance.

Single Zener Diodes Part Context

This part belongs to the MMSZ5221B through MMSZ5259B series of 500mW surface mount Zener diodes. The series covers a wide voltage range from 2.4V to 39V, all sharing identical mechanical dimensions and termination finishes. The MMSZ5254B specifically targets the 27V segment of this standardized product line.

Single Zener Diodes Replacement Considerations

Direct substitutes within the same series include other MMSZ52xxB variants with different voltage ratings but identical packages. Cross-manufacturer replacements must match the SOD123 outline, 500mW power rating, and 27V Zener voltage specifications.