MMBZ5249B-G3-18

Single Zener Diodes Overview

The MMBZ5249B-G3-18 is a single Zener diode manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 19 V with a tolerance of ±5%. The device has a maximum power dissipation of 500 mW and operates within a junction temperature range of -55°C to +150°C. It utilizes an SOD-123 surface-mount package. Key electrical characteristics include a maximum reverse leakage current of 100 nA at 14 V and a maximum Zener impedance of 23 Ohms.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation via Zener breakdown mechanism in the reverse bias region.
• Designed for surface-mount assembly using the compact SOD-123 package format.
• Capable of operating reliably across an extended industrial temperature range.

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels.
• Overvoltage protection stages for sensitive semiconductor inputs.
• Clamping applications in signal conditioning paths.

Single Zener Diodes Procurement Notes

Verify the specific suffix G3-18 against official Vishay documentation to confirm RoHS compliance and reel packaging specifications. Ensure the ordering part number matches the exact electrical tolerances and package dimensions required for the target PCB layout. Cross-reference datasheet revisions to confirm material composition and manufacturing origin details prior to procurement.

Single Zener Diodes Selection Notes

Select this component when a 19 V regulation point is required in a space-constrained surface-mount design. Compare the 500 mW power rating against expected thermal loads to ensure adequate heat dissipation. Evaluate the 23 Ohm impedance value against circuit sensitivity requirements to determine if lower noise alternatives are necessary for the specific application environment.

Single Zener Diodes Part Context

This component belongs to the MMBZ5249B series of single Zener diodes from Vishay. It is part of a broader family offering various voltage ratings within the same SOD-123 footprint, allowing for standardized inventory management across different voltage reference designs within electronic systems.

Single Zener Diodes Replacement Considerations

Publicly confirmed substitute part numbers were not identified in the provided source material. Verify compatibility with alternative manufacturers based on matching Zener voltage, power dissipation, and package dimensions before substitution.