MM3Z5V1ST1G

Single Zener Diodes Overview

The MM3Z5V1ST1G is a single Zener voltage regulator diode from the MM3ZxxxST1G series, manufactured by onsemi. It is housed in an SOD-323 surface-mount package with dimensions of 1.7 mm x 1.25 mm and a low body height of 0.9 mm. The device provides a nominal reverse Zener voltage (VZ) range of 4.98 V to 5.2 V when tested at a current (IZT) of 5.0 mA. It features a maximum Zener impedance (ZZT) of 60 Ω and a maximum reverse leakage current (IR) of 2.0 μA at a reverse voltage (VR) of 1.0 V. The steady-state power dissipation rating is 300 mW on a standard FR-4 board and up to 500 mW with optimized heatsinking. The component operates within a junction temperature range of -65°C to +150°C.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation protection suitable for space-constrained designs.
• Features tight tolerance specifications for stable Zener voltage performance.
• Includes high electrostatic discharge (ESD) protection capability per Human Body Model.

Single Zener Diodes Applications

• Cellular phones
• Hand-held portable devices
• High density PC boards

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required voltage tolerance and package type. Confirm compliance with RoHS standards and lead-free requirements if applicable to your manufacturing process. Ensure the ordering suffix aligns with the desired tape and reel packaging quantity. Cross-reference the electrical characteristics table to validate test conditions against your circuit design parameters.

Single Zener Diodes Selection Notes

Select this component when a compact surface-mount solution is required for low-voltage regulation. Consider the 300 mW power dissipation limit on standard PCBs versus the higher rating available with dedicated copper heatsinks. Evaluate the 60 Ω dynamic impedance for noise sensitivity in your application. Verify that the operating temperature range meets the environmental demands of the final assembly.

Single Zener Diodes Part Context

This device belongs to the MM3ZxxxST1G series of Zener voltage regulators designed for surface mount applications. The series offers a wide breakdown voltage range from 3.3 V to 36 V in the same small SOD-323 footprint. The MM3Z5V1ST1G specifically targets the ~5 V regulation segment, offering tighter tolerances compared to general-purpose variants. It serves as a cost-effective alternative to larger through-hole packages in modern electronics.

Single Zener Diodes Replacement Considerations

Direct replacements include other members of the MM3ZxxxST1G series with similar voltage ratings, such as MM3Z5V6ST1G or MM3Z4V7ST1G, provided the voltage tolerance and impedance meet circuit requirements. SZMM3Z5V1ST1G is also available for automotive applications requiring AEC-Q101 qualification and PPAP capability.

Single Zener Diodes FAQ

What is the maximum Zener impedance for the MM3Z5V1ST1G?

The maximum Zener impedance (ZZT) is 60 Ω when tested at the specified test current of 5.0 mA.

Does the MM3Z5V1ST1G have an automotive qualified version?

Yes, the SZMM3Z5V1ST1G variant is AEC-Q101 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements.

What is the typical capacitance of this device?

The maximum capacitance is 225 pF, measured at 0 V bias and 1 MHz frequency.