MMSZ5259B

Single Zener Diodes Overview

The MMSZ5259B is a surface-mount planar Zener diode manufactured by Diotec Semiconductor in the SOD-123F package. It provides a nominal Zener voltage of 39 V with a standard tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within a junction temperature range of -50°C to +150°C. Key electrical characteristics include a dynamic resistance of less than 80 Ohms at a test current of 3.2 mA, a reverse leakage current of less than 800 nA at 30 V, and a positive temperature coefficient of approximately +9.4% per degree Celsius.

Single Zener Diodes Feature Summary

• Sharp Zener voltage breakdown characteristic for stable regulation
• Low leakage current capability
• Low profile SMD construction suitable for automated assembly

Single Zener Diodes Applications

• Voltage stabilization circuits
• Voltage regulators
• Overvoltage protection (uni-directional)

Single Zener Diodes Procurement Notes

Verify that the ordered part number matches the specific suffix requirements for your application grade. Standard commercial versions lack automotive qualification. Confirm compliance with RoHS, REACH, and Conflict Minerals regulations as stated in the datasheet. Ensure the procurement specification aligns with the required AEC-Q101 status if automotive reliability is necessary.

Single Zener Diodes Selection Notes

Select this component for general-purpose voltage reference or regulation tasks requiring a 39 V breakdown point. Consider the thermal resistance values when designing heat dissipation on the PCB. Verify that the operating current remains within the specified limits to maintain the desired voltage accuracy and prevent exceeding the 500 mW power dissipation rating.

Single Zener Diodes Part Context

This component belongs to the MMSZ5227B through MMSZ5262B series of SMD Planar Zener Diodes from Diotec Semiconductor. The series covers a wide voltage range from 3.6 V to 51 V, all sharing the same SOD-123F footprint and 500 mW power handling capability. This allows designers to standardize on a single package type across various voltage requirements within a circuit design.

Single Zener Diodes Replacement Considerations

Cross-referencing requires matching the 39 V nominal voltage, 500 mW power rating, and SOD-123F package. Verify that alternative manufacturers offer components with comparable dynamic impedance and leakage current specifications to ensure equivalent circuit performance.