MM3Z18VT1G

Single Zener Diodes Overview

The MM3Z18VT1G is a single-channel Zener voltage regulator diode manufactured by onsemi, designed for surface-mount applications in the SOD-323 (SC-76) package. It features a nominal Zener breakdown voltage of 18 V with a tolerance range of 16.8 V to 19.1 V at a test current of 5 mA. The device has a steady-state power dissipation rating of 300 mW and a maximum Zener impedance of 45 Ω. Electrical characteristics include a reverse leakage current of 50 nA maximum at 12.6 V and a typical voltage temperature coefficient of 16 mV/K. The component operates within a junction and storage temperature range of -65°C to +150°C.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation protection suitable for space-constrained designs
• Features low body height and small outline dimensions for high-density PCB mounting
• Includes ESD protection capability rated at Class 3 (> 16 kV) per Human Body Model

Single Zener Diodes Applications

• Cellular phones
• Handheld portable devices
• High density PC boards

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required tape and reel specifications, as packaging details are defined in BRD8011/D. Confirm the specific device marking code corresponds to the 18 V variant. Ensure compliance with RoHS directives and Pb-Free status requirements for the target assembly process. Check for any site-specific control changes if automotive qualification is needed.

Single Zener Diodes Selection Notes

Select this component when a compact surface-mount solution is required for general-purpose voltage regulation. The SOD-323 package offers a balance of thermal performance and board space efficiency. Consider the 300 mW power rating and 150°C maximum junction temperature for thermal management calculations. Verify that the 18 V nominal breakdown aligns with the circuit's reference or clamping requirements.

Single Zener Diodes Part Context

This part belongs to the MM3ZxxxT1G series of Zener Voltage Regulators from onsemi. The series covers a standard breakdown voltage range from 2.4 V to 75 V. These diodes are engineered for applications where physical size is a critical constraint, utilizing a void-free, transfer-molded plastic case with corrosion-resistant external surfaces.

Single Zener Diodes Replacement Considerations

Direct substitutes within the same series include other MM3ZxxxT1G variants with different voltage ratings but identical package and electrical profiles. Automotive-grade equivalents with the SZ prefix (e.g., SZMM3Z18VT1G) offer AEC-Q101 qualification and PPAP capability while maintaining the same functional specifications.