SZMMSZ5249BT1G

Single Zener Diodes Overview

The SZMMSZ5249BT1G is a single Zener voltage regulator diode from onsemi, housed in an SOD-123 surface-mount package. It provides a nominal reverse Zener voltage of 19 V with a tolerance of ±5%. The device operates at a test current of 6.6 mA and exhibits a maximum Zener impedance of 23 Ohms at this current level. It supports a total power dissipation of 500 mW on an FR-5 board and functions within a junction temperature range of -55°C to +150°C.

Single Zener Diodes Feature Summary

• Designed for high-density applications with a small surface-mount footprint optimized for automated assembly.
• Features robust electrostatic discharge protection rated at Class 3 per the human body model.
• Includes the SZ prefix designation indicating qualification for automotive environments requiring specific site and control change protocols.

Single Zener Diodes Applications

• Voltage regulation in general-purpose electronic circuits
• Clamping applications in medium-current systems
• Reference voltage generation in compact PCB designs

Single Zener Diodes Procurement Notes

Verify that the ordering suffix BT1G corresponds to the standard 3,000-unit tape and reel packaging configuration. Confirm that the SZ prefix requirement aligns with project specifications for automotive-grade supply chain controls and unique site management. Ensure compliance with RoHS directives and lead-free manufacturing standards during procurement.

Single Zener Diodes Selection Notes

Select this component when a 19 V reference is required in a space-constrained design utilizing the SOD-123 form factor. Consider the 500 mW thermal rating and the specific 6.6 mA test current for biasing calculations. Evaluate the AEC-Q101 qualification status if the application demands automotive reliability standards and PPAP capability.

Single Zener Diodes Part Context

This part belongs to the MMSZ52xxxT1G and SZMMSZ52xxxT1G series of Zener voltage regulators. These devices serve as alternatives to leadless packages, offering a convenient surface-mount solution. The series covers a wide reverse voltage range from 2.4 V to 110 V, providing flexibility for various voltage regulation needs across different industrial and consumer electronics sectors.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other parts within the MMSZ5249BT1G or SZMMSZ5249BT1G families. Verify pinout compatibility and electrical characteristics such as Zener impedance and leakage current before substitution.