UMZ18NFHT106

Overview

The UMZ18NFHT106 is a dual Zener diode array manufactured by ROHM Semiconductor, designed for automotive applications under the AEC-Q101 qualification standard. It features a common anode configuration with two independent Zener elements housed in a compact UMD3 (SOT-323) surface-mount package. The nominal Zener voltage is 18 V with a tight tolerance of ±2.19%, ensuring precise voltage regulation. The device supports a maximum power dissipation of 200 mW and operates within a junction temperature range up to 150°C. Reverse leakage current is specified at 100 nA when measured at 13 V, providing low standby power consumption.

Feature Summary

• Automotive-grade reliability certified to AEC-Q101 standards for harsh environment durability
• Compact UMD3 surface-mount package optimized for high-density PCB layouts
• Dual common-anode configuration enabling efficient terminal protection circuits

Applications

• I/O port protection against electrostatic discharge and transient voltages
• Terminal protection devices in automotive electronic control units
• Voltage reference and clamping in automotive sensor interfaces

Procurement Notes

Verify component authenticity through authorized distribution channels or direct manufacturer confirmation. Ensure the ordering suffix matches the required packaging format, such as tape and reel quantities. Confirm that the specific batch meets AEC-Q101 automotive quality requirements before integration into safety-critical systems.

Selection Notes

Select this component when a dual Zener array with common anode topology is required for space-constrained automotive designs. The 18 V rating suits applications protecting lines operating below this threshold. Consider the ±2.19% tolerance for precision requirements and verify compatibility with the target PCB footprint for the SOT-323 package.

Part Context

This part belongs to the UMZ18 series of Zener arrays from ROHM, specifically engineered for automotive terminal protection. The NFHT106 suffix denotes the specific voltage variant, tolerance, and packaging configuration within the broader family of small-signal Zener diodes designed for high-reliability electronic environments.

Replacement Considerations

Direct pin-compatible substitutes within the same series include UMZ18KFHTL, though it utilizes a UMD4 package. Other variants like UMZ27NFHT106 offer different voltage ratings but share the same physical footprint and electrical characteristics aside from the Zener voltage specification.