UMZ27NFHT106

Overview

The UMZ27NFHT106 is a dual Zener diode array manufactured by ROHM Semiconductor, designed for surface-mount applications in automotive and industrial environments. It features a nominal Zener voltage of 27 V with a tight tolerance of 2%, tested at a current of 5 mA. The device operates within a junction temperature range of -55°C to +150°C and dissipates up to 200 mW. Packaged in an SOT-323-3 (UMD3) housing measuring 2 mm x 1.25 mm x 0.7 mm, it meets AEC-Q101 qualification standards. Maximum reverse leakage current is specified at 100 nA.

Feature Summary

• Dual configuration providing two independent Zener channels within a single compact package for efficient terminal protection.
• Automotive-grade reliability certified under AEC-Q101 standards, ensuring stability across wide temperature ranges.
• Low capacitance design optimized for high-speed signal lines to minimize data distortion during ESD events.

Applications

• Protection of I/O ports in automotive electronic control units against electrostatic discharge.
• Clamping transient voltage spikes on high-speed data communication interfaces.
• Terminal protection circuits in industrial equipment requiring robust ESD immunity.

Procurement Notes

Verify the complete part number including the suffix HT106 to confirm the specific tape-and-reel packaging quantity and orientation. Ensure compatibility with existing PCB footprints designated for SOT-323 packages. Confirm that the AEC-Q101 qualification status aligns with specific project requirements for automotive or high-reliability industrial deployments before finalizing procurement orders.

Selection Notes

Select this component when a dual-channel Zener solution is required for space-constrained designs. The 2% voltage tolerance offers precision superior to standard general-purpose diodes. Consider the 200 mW power dissipation limit for thermal management in dense assemblies. Verify that the 27 V breakdown voltage matches the system's maximum operating voltage without interfering with normal signal levels.

Part Context

This part belongs to ROHM's UMZ series of low-capacitance Zener arrays specifically engineered for protecting sensitive electronics. The UMZ27 variant provides a 27 V reference point, distinguishing it from other voltage ratings in the family such as the UMZ18 or UMZ36. It utilizes the UMD3 package to offer a small footprint suitable for modern miniaturized circuit boards.

Replacement Considerations

Direct pin-compatible replacements include the UMZ27NFMFHT106. Designers should verify that any substitute maintains the same SOT-323-3 footprint and AEC-Q101 qualification if automotive compliance is mandatory. Check for identical electrical parameters, particularly the 27 V Zener voltage and 200 mW power rating.