MMSZ4689ET1G

Single Zener Diodes Overview

The onsemi MMSZ4689ET1G is a single-channel Zener voltage regulator diode housed in an SOD-123 surface-mount package. It features a nominal reverse Zener voltage of 5.1 V with a tolerance range of 4.85 V to 5.36 V at a test current of 50 µA. The device supports a maximum power dissipation of 500 mW and withstands peak surge power of 225 W for 8 x 20 ms pulses. Operating temperatures span from -55°C to +150°C, with a maximum reverse leakage current of 10 µA at 3 V.

Single Zener Diodes Feature Summary

• Qualified for automotive applications under AEC-Q101 standards and capable of PPAP submission.
• Features high ESD protection rated at Class 3 (> 16 kV) per the Human Body Model.
• Utilizes a void-free, transfer-molded thermosetting plastic case with UL 94 V-0 flammability rating.
• Designed for optimal automated board assembly with corrosion-resistant and easily solderable finishes.

Single Zener Diodes Applications

• Automotive electronic circuits requiring unique site and control change documentation.
• General-purpose voltage regulation in surface-mount PCB designs.
• Clamping and protection circuits in high-density electronic assemblies.

Single Zener Diodes Procurement Notes

Verify that the ordered part number includes the ET1G suffix to ensure the correct SOD-123 package configuration and tape-and-reel packaging quantity of 3,000 units. Confirm compliance with RoHS directives and lead-free material requirements as specified in the manufacturer's sustainability documentation before finalizing procurement specifications.

Single Zener Diodes Selection Notes

Select this component when a precise 5.1 V reference or regulation point is required within a compact surface-mount footprint. Consider the thermal resistance characteristics and derating curves if operating near the upper temperature limits. Ensure the application current remains within the specified test conditions to maintain voltage accuracy and reliability over the intended operational lifespan.

Single Zener Diodes Part Context

This device belongs to the MMSZ4xxxET1G series of Zener voltage regulators, which offers a wide reverse voltage range from 1.8 V to 43 V. The series provides a convenient alternative to leadless packages while maintaining small physical dimensions suitable for high-density applications. The SZ prefix variant is specifically designated for automotive and other applications requiring strict quality and change management protocols.

Single Zener Diodes Replacement Considerations

Direct substitutes within the same series include MMSZ4688ET1G (4.7 V) and MMSZ4690ET1G (5.6 V). For identical voltage ratings, verify compatibility with MMSZ4689T1G or SZMMSZ4689ET1G, ensuring package and qualification requirements match the design constraints.

Single Zener Diodes FAQ

What is the marking code for the MMSZ4689ET1G?

The device marking code for the MMSZ4689ET1G is CG8.

How is polarity indicated on the SOD-123 package?

Polarity is indicated by a cathode band on the component body, corresponding to Pin 1.

What is the maximum nonrepetitive surge power capability?

The device can withstand a peak power of 225 W for an 8 x 20 µs pulse waveform.