UMZ16KFHTL

Overview

The UMZ16KFHTL is a Zener diode manufactured by ROHM Semiconductor, designed for surface mount applications. It operates within an automotive grade qualification standard (AEC-Q101). The device features a dual configuration housed in a UMD4 package, also identified as SOT-343 or SC-82A. Key electrical parameters include a nominal Zener voltage of 16 V, with a minimum of 15.85 V and a maximum of 16.51 V. The power dissipation rating is 200 mW at a test current of 5 mA. The component supports a maximum junction temperature of 150°C and functions within a storage temperature range of -55°C to +150°C. Reverse leakage current is specified at 100 nA.

Feature Summary

• Automotive-grade reliability compliant with AEC-Q101 standards
• Dual-line configuration for compact circuit integration
• High thermal stability with a 150°C maximum junction temperature

Applications

• Surge protection in automotive electronic systems
• Voltage regulation in compact surface-mount circuits
• Over-voltage protection for sensitive semiconductor components

Procurement Notes

Verify the supply status carefully before procurement, as this component is marked as Not Recommended for New Designs (NRND). Production is limited to supporting existing customers rather than new design introductions. Confirm that the ordering suffix HTL matches the required tape and reel quantity specifications. Ensure compatibility with legacy designs only, as future availability may be restricted.

Selection Notes

Select this component only for retrofitting or maintaining existing automotive designs where the specific UMD4 footprint and dual-channel characteristics are mandatory. Evaluate the 200 mW power dissipation limit against peak load conditions. Consider the AEC-Q101 qualification if automotive environmental robustness is required. Verify that the 16 V Zener voltage aligns precisely with the target circuit's regulation requirements.

Part Context

This part belongs to the UMZ series of Zener diodes from ROHM Semiconductor, specifically tailored for automotive electronics. The UMZ16KFHTL variant utilizes the UMD4 package, offering a dual-diode solution in a small form factor. It is distinct from single-channel alternatives like the EDZVFH series, which use different packaging such as EMD2. The series emphasizes high reliability and compliance with strict automotive industry standards.

Replacement Considerations

No direct public substitute is confirmed for this specific dual-configuration part number. Single-channel alternatives like the EDZVFH7.5B exist but differ in pin count and package type. Designers should verify if the dual functionality can be replaced by discrete single diodes or if a redesign is necessary due to the NRND status.