MMSZ4688ET3

Single Zener Diodes Overview

The MMSZ4688ET3G is a unidirectional silicon Zener voltage regulator diode manufactured by onsemi. It operates within the MMSZ4xxxET1G series and is housed in an SOD-123 (CASE 425-04) surface-mount package with two terminals. The device provides a nominal reverse Zener voltage of 4.7 V, measured at a test current of 50 µA, with a tolerance range of 4.47 V to 4.94 V. It features a maximum total power dissipation of 500 mW on an FR-5 board at 75°C ambient temperature, derating linearly above this threshold. The component supports a peak nonrepetitive surge power of 225 W for an 8 x 20 ms pulse duration. Operating temperatures range from -55°C to +150°C for both junction and storage conditions.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a compact surface-mount plastic SOD-123 package designed for automated assembly.
• Features high electrostatic discharge robustness rated at Class 3 per the Human Body Model.
• Capable of handling significant transient energy through high peak power dissipation capabilities.

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection for sensitive electronic components
• Clamping applications in signal processing lines

Single Zener Diodes Procurement Notes

Verify that the ordering suffix ET3G corresponds to the specific tape and reel packaging quantity required for your production line. Confirm that the SZ prefix is not necessary if automotive site control or unique part marking requirements are not mandated by your design specifications. Ensure compatibility with standard lead-free soldering profiles as defined in manufacturer mounting manuals.

Single Zener Diodes Selection Notes

Select this component when a 4.7 V regulation point is needed in space-constrained designs utilizing the SOD-123 footprint. Evaluate thermal management requirements against the 500 mW continuous dissipation limit and the derating curve provided for ambient temperatures exceeding 75°C. Consider the low leakage current characteristics for high-impedance circuit applications.

Single Zener Diodes Part Context

This device belongs to the MMSZ4xxxET1G series of Zener diodes offered by onsemi. The series covers a wide reverse voltage range from 1.8 V to 43 V, all sharing the same physical SOD-123 package dimensions. This allows designers to maintain consistent board layouts while adjusting voltage ratings across different product variants within the same family.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering Zener diodes in the SOD-123 package with a 4.7 V nominal voltage and 500 mW power rating. Verify that any substitute matches the electrical tolerances, thermal resistance values, and physical pinout configuration to ensure direct interchangeability without PCB redesign.

Single Zener Diodes FAQ

What is the maximum operating junction temperature for this diode?

The maximum operating junction temperature is +150°C.

How is the polarity indicated on the device package?

The cathode is identified by a polarity band printed on the component body.