MMSZ5249C-HE3-08

Single Zener Diodes Overview

The MMSZ5249C-HE3-08 is a silicon planar Zener diode manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 19 V with a tight tolerance of ±2%. The device operates in the SOD-123 surface-mount package and supports a maximum power dissipation of 500 mW at thermal equilibrium. It is qualified to AEC-Q101 standards for automotive applications, ensuring robust performance across an operating temperature range of -55°C to +150°C.

Single Zener Diodes Feature Summary

• AEC-Q101 qualified for automotive reliability requirements
• High precision voltage regulation with ±2% tolerance
• ESD protection capability exceeding 8 kV via Human Body Model

Single Zener Diodes Applications

• Automotive electronic circuit protection
• Precision voltage reference generation
• Over-voltage clamping in sensitive signal lines

Single Zener Diodes Procurement Notes

Verify that the ordering code explicitly includes the HE3_A suffix to confirm AEC-Q101 qualification status. Ensure the C suffix is present to guarantee the required ±2% voltage tolerance. Cross-reference the specific datasheet revision against your design requirements to validate electrical characteristics and package dimensions before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when strict voltage accuracy is critical for the target application. The AEC-Q101 qualification makes it suitable for automotive environments where high reliability is mandatory. Consider the SOD-123 footprint constraints during PCB layout to ensure proper thermal dissipation and mechanical stability within the assembly process.

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. The HE3_A variant specifically denotes RoHS-compliant devices that meet automotive grade standards, distinguishing them from commercial grade counterparts in the same physical package family.

Single Zener Diodes Replacement Considerations

• MMSZ5249C-E3-08
• MMSZ5249C-G3-18

Single Zener Diodes FAQ

What is the ESD protection rating for this component?

The device provides ESD capability according to AEC-Q101 standards, supporting greater than 8 kV via the Human Body Model and greater than 800 V via the Machine Model.

How does the 'C' suffix affect the electrical specifications?

The 'C' suffix indicates a standard Zener voltage tolerance of ±2%, which is tighter than the ±5% tolerance found in parts with the 'B' suffix.