MMSZ5255B-E3-18

Single Zener Diodes Overview

The MMSZ5255B-E3-18 is a silicon planar Zener diode manufactured by Vishay Semiconductors. It provides a nominal Zener voltage of 28 V with a standard tolerance of ±5%. The device operates within a test current range of 4.5 mA and features a maximum reverse leakage current of 0.1 µA at 21 V. It has a dynamic impedance of 44 Ω and a temperature coefficient of 0.091 %/°C. Rated for a power dissipation of 500 mW, it utilizes an SOD-123 surface-mount package.

Single Zener Diodes Feature Summary

• Utilizes silicon planar technology for stable voltage regulation
• Provides standard ±5% Zener voltage tolerance
• Features low reverse leakage current characteristics
• Compatible with automated surface-mount assembly processes

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection stages
• Clamping applications in signal processing

Single Zener Diodes Procurement Notes

Verify the specific ordering code suffix to confirm reel packaging dimensions and quantity. Confirm RoHS compliance status and material categorization details directly from the manufacturer's documentation before finalizing procurement specifications.

Single Zener Diodes Selection Notes

Select this component when a precise 28 V reference is required in a compact surface-mount footprint. Ensure the application circuit accounts for the specified thermal resistance and power dissipation limits under expected ambient operating conditions.

Single Zener Diodes Part Context

This part belongs to the MMSZ5225 to MMSZ5267 series of small signal Zener diodes. The series offers a wide range of nominal voltages from 3.0 V to 75 V in the SOD-123 package format, providing designers with standardized options for various voltage regulation needs.

Single Zener Diodes Replacement Considerations

Direct substitutes include other Vishay parts within the same series offering identical electrical parameters and package dimensions. Cross-manufacturer replacements must match the 28 V nominal voltage, SOD-123 footprint, and equivalent power dissipation ratings.