MMSZ5257B

Single Zener Diodes Overview

The onsemi MMSZ5257B is a single-channel surface-mount Zener diode housed in an SOD-123 package. It features a nominal Zener voltage of 33 V with a 5% tolerance and a maximum power dissipation of 500 mW at 25°C. The device operates within a junction temperature range up to +150°C and a storage temperature range of -55°C to +150°C. Key electrical characteristics include a test current of 3.8 mA, a maximum Zener impedance of 58 Ω, and a maximum reverse leakage current of 100 nA.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation for general-purpose applications using planar die construction.
• Designed for automated assembly processes with lead-free finish and RoHS compliance.
• Offers high electrostatic discharge protection rated at 16 kV per the Human Body Model.

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• Clamping applications

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin, as the MMSZ5257B part number is utilized by multiple semiconductor vendors including onsemi, Fairchild, Diodes Incorporated, and Micro Commercial Components. Confirm that the received component matches the required datasheet specifications and marking code (M2) before integration into production.

Single Zener Diodes Selection Notes

Select this component when a 33 V regulation point is required in a compact SOD-123 footprint. Ensure the application current remains within the limits defined by the 500 mW power dissipation rating. Consider thermal resistance constraints if operating near the maximum junction temperature limit.

Single Zener Diodes Part Context

This device belongs to the MMSZ52 series of 500 mW Zener diodes, covering a voltage range from approximately 2.4 V to 39 V. The series is characterized by consistent physical dimensions and electrical testing standards across different manufacturers, facilitating broad availability and interchangeability in standard surface-mount designs.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers' MMSZ5257B parts such as those from Diodes Incorporated or Micro Commercial Components. Verify that alternative sources adhere to the same SOD-123 outline and electrical tolerances specified in the original datasheet.

Single Zener Diodes FAQ

What is the marking code for the MMSZ5257B?

The device marking code is M2.

What is the maximum forward voltage of the MMSZ5257B?

The maximum forward voltage is 0.9 V at a forward current of 10 mA.