UMZ5.1NFHT106

Overview

The UMZ5.1NFHT106 is a Zener diode array manufactured by ROHM Semiconductor, designed for terminal protection applications in compliance with AEC-Q101 automotive standards. It features a dual common anode configuration housed in a compact UMD3 (SOT-323) surface-mount package. The device specifies a nominal Zener voltage of 5.1 V with a tight tolerance of ±2%, ensuring precise clamping performance. Rated for a maximum power dissipation of 200 mW, it supports a junction temperature up to 150°C and operates within a storage range of -55°C to 150°C. The component integrates low capacitance characteristics suitable for high-speed signal line protection.

Feature Summary

• Dual common anode Zener array structure for efficient bidirectional or differential line protection
• Automotive-grade reliability certified under AEC-Q101 standards for harsh environment durability
• Compact UMD3 plastic package design minimizing board space requirements while maintaining thermal stability

Applications

• I/O port protection for automotive electronic control units
• ESD suppression on high-speed data communication lines
• Terminal protection circuits in infotainment and sensor modules

Procurement Notes

Verify the specific suffix HT106 corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the AEC-Q101 qualification status remains active for the intended production volume. Ensure compatibility with standard SMT reflow profiles specified in the official datasheet to maintain device integrity during manufacturing.

Selection Notes

Select this component when a dual-channel Zener solution is required for common anode configurations in space-constrained automotive designs. The 5.1 V breakdown voltage suits low-voltage digital interfaces. Consider the 200 mW power rating against expected transient energy levels. Verify that the SOT-323 footprint aligns with the PCB layout constraints compared to larger packages like SC-70 alternatives.

Part Context

This part belongs to the UMZ series of Zener arrays optimized for ESD protection in automotive electronics. It shares the UMD3 package form factor with other variants in the family, such as the UMZ18NFHT106, but differs in breakdown voltage and specific capacitance values. The series is engineered to meet stringent automotive reliability requirements while providing robust transient voltage suppression.

Replacement Considerations

Direct pin-compatible substitutes within the same series include the UMZ5.1NUMTL, which offers similar electrical characteristics in a comparable surface-mount package. Verify that any alternative maintains the AEC-Q101 certification if automotive qualification is mandatory for the application.