AMMSZ5256A-HF

Single Zener Diodes Overview

The AMMSZ5256A-HF is an automotive-grade Zener diode manufactured by Comchip Technology. It features a nominal Zener voltage of 100 V with a tight tolerance of 2%. The device is designed for surface-mount installation in the SOD-123-2 package, measuring 3.85 mm in length, 1.75 mm in width, and 1.3 mm in height. It supports a maximum power dissipation of 500 mW and operates within a temperature range of -55°C to +150°C. Key electrical parameters include a maximum reverse leakage current of 100 nA, a Zener impedance of 400 Ohms at a test current of 0.5 mA, and a forward voltage of 900 mV at 10 mA.

Single Zener Diodes Feature Summary

• Automotive-grade reliability suitable for demanding electronic environments
• High precision voltage regulation with 2% tolerance
• Compact surface-mount design for space-constrained applications

Single Zener Diodes Applications

• Voltage reference circuits in automotive electronics
• Over-voltage protection in vehicle control modules
• Clamping applications in automotive signal processing

Single Zener Diodes Procurement Notes

Verify the specific suffix 'A' indicates the 2% tolerance variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the SOD-123-2 footprint matches the target PCB layout requirements. Validate that the 500 mW power rating aligns with the thermal management capabilities of the final assembly under expected operating conditions.

Single Zener Diodes Selection Notes

Select this component when a precise 100 V reference is required in automotive systems. The 2% tolerance offers higher accuracy than standard 5% variants. The SOD-123-2 package provides a balance between thermal performance and board space efficiency. Consider the 150°C maximum junction temperature for high-heat environments typical in engine compartments or power distribution units.

Single Zener Diodes Part Context

This part belongs to Comchip Technology's AMMSZ series of automotive Zener diodes. The series is characterized by its compliance with automotive quality standards and availability in various voltage ratings. The SOD-123 package is widely used in modern electronics for its small form factor and reliable soldering characteristics.

Single Zener Diodes Replacement Considerations

Direct substitutes must match the 100 V Zener voltage, 2% tolerance, 500 mW power rating, and SOD-123-2 package. Verify that any alternative component meets the same automotive qualification standards and thermal specifications.