AMMSZ5243B-HF

Single Zener Diodes Overview

The AMMSZ5243B-HF is a single Zener diode manufactured by Comchip Technology, designed for surface-mount applications. It features a nominal Zener voltage of 13 V with a tight 2% tolerance and operates at a power dissipation of 500 mW. The device is qualified under the AEC-Q101 standard for automotive reliability. It utilizes an SOD-123-2 package, measuring 3.85 mm in length, 1.75 mm in width, and 1.3 mm in height. Electrical characteristics include a maximum reverse leakage current of 1 uA and a Zener impedance of 13 Ohms at a test current of 9.5 mA. The component supports an operating temperature range from -55 C to +150 C.

Single Zener Diodes Feature Summary

• Automotive-grade qualification compliant with AEC-Q101 standards
• High precision voltage regulation with 2% tolerance
• Compact SMD footprint compatible with automated assembly

Single Zener Diodes Applications

• Automotive electronic circuit protection
• Voltage reference stabilization in vehicle systems
• Over-voltage protection for sensitive automotive components

Single Zener Diodes Procurement Notes

Verify the specific suffix 'HF' confirms halogen-free compliance as per manufacturer specifications. Confirm that the AEC-Q101 qualification status is explicitly stated in the official datasheet for the exact part number variant. Ensure the ordering code matches the required 2% tolerance grade, as other variants may exist within the same family. Cross-reference the package dimensions against the PCB layout requirements to ensure compatibility with the SOD-123-2 form factor.

Single Zener Diodes Selection Notes

Select this component when high-reliability voltage regulation is required in automotive environments. The 2% tolerance offers superior accuracy compared to standard 5% or 10% Zener diodes. The SOD-123-2 package provides a space-efficient solution for dense PCB layouts. Consider the 500 mW power rating to ensure adequate thermal headroom for the intended application current levels.

Single Zener Diodes Part Context

This part belongs to Comchip Technology's automotive-grade Zener diode portfolio. It shares the SOD-123-2 package style with other devices in the series but distinguishes itself through stricter voltage tolerance and automotive certification. It serves as a specialized alternative to general-purpose Zener diodes where reliability and precision are critical factors in the design.

Single Zener Diodes Replacement Considerations

AMMSZ5243A-HF is a confirmed substitute with identical 13 V voltage and SOD-123-2 package, though it differs in voltage tolerance specification.