MMSZ5257BQ-7-F

Single Zener Diodes Overview

The MMSZ5257BQ-7-F is an automotive-grade surface mount Zener diode manufactured by Diodes Incorporated. It provides a nominal Zener voltage of 33 V with a tolerance range of 31.35 V to 34.65 V at a test current of 3.8 mA. The device dissipates up to 500 mW at a lead temperature of +75°C and operates within a junction temperature range of -65°C to +150°C. Packaged in SOD-123, it features a maximum Zener impedance of 58 Ohms and a reverse leakage current of 0.1 µA at 25 V.

Single Zener Diodes Feature Summary

• Qualified to AEC-Q101 standards for high reliability in automotive environments
• Totally lead-free and fully RoHS compliant construction
• Halogen and antimony free "Green" device utilizing molded plastic compound

Single Zener Diodes Applications

• Automotive electronic circuit protection
• Voltage reference applications requiring high reliability
• General purpose medium current regulation

Single Zener Diodes Procurement Notes

Verify the specific suffix Q-7-F indicates automotive qualification per the manufacturer's ordering information table. Confirm package dimensions match SOD-123 requirements for automated assembly processes. Ensure compliance with moisture sensitivity level 1 specifications during storage and handling procedures.

Single Zener Diodes Selection Notes

Select this component when automotive reliability certification is mandatory for the target application. Compare thermal resistance values against available PCB copper pad layouts to ensure adequate heat dissipation. Verify that the 33 V breakdown voltage aligns precisely with the required circuit protection thresholds.

Single Zener Diodes Part Context

This part belongs to the MMSZ5221B through MMSZ5259B series of 500mW surface mount Zener diodes. The 'Q' designation specifically denotes automotive grade qualification, distinguishing it from commercial variants. The series offers various voltage options within the SOD-123 package format.

Single Zener Diodes Replacement Considerations

MMSZ5257B-7-F (Commercial Grade)

Single Zener Diodes FAQ

What does the 'Q' suffix indicate in the part number?

The 'Q' suffix indicates that the device is qualified to AEC-Q101 standards for high reliability automotive applications.

What is the maximum power dissipation rating?

The maximum power dissipation is 500 mW at a lead temperature of +75°C.