UMZ6.8KFHTL

Overview

The UMZ6.8KFHTL is a dual common anode Zener diode array manufactured by ROHM Semiconductor, designed for surface-mount applications in the UMD package (SOT-343). It features a nominal Zener voltage of 6.8V with a tolerance of ±5%, tested at a current of 5mA. The device has a maximum power dissipation of 200mW and operates within a junction temperature range up to +150°C. Key electrical parameters include a maximum reverse leakage current of 500nA and a Zener impedance of 40Ω. The component complies with AEC-Q101 standards for automotive grade reliability.

Feature Summary

• Dual common anode configuration providing two independent Zener references in a single compact package.
• Automotive-grade qualification compliant with AEC-Q101 standards for high reliability.
• Low capacitance characteristics suitable for protecting sensitive signal lines from transient voltages.

Applications

• Terminal protection circuits in automotive electronic control units.
• Voltage reference generation for analog-to-digital converters.
• Clamping circuits for ESD protection on data interfaces.

Procurement Notes

Verify the ordering part number UMZ6.8KFHTL against the specific suffix requirements for tape-and-reel packaging quantities. Confirm that the UMD package dimensions align with the target PCB footprint. Ensure the supplier provides documentation confirming AEC-Q101 compliance if the application mandates automotive grade certification. Check for any obsolescence notices as this series may be subject to lifecycle changes.

Selection Notes

Select this component when a dual Zener solution is required in a small form factor for automotive or industrial environments. The 6.8V rating suits applications needing precise clamping near standard logic levels. Consider the 200mW power dissipation limit for thermal management in dense layouts. Compare with single-channel alternatives if only one reference is needed to optimize board space.

Part Context

This part belongs to the UMZ series of Zener diode arrays from ROHM, specifically engineered for terminal protection and voltage regulation. The 'K' suffix typically denotes the ±5% tolerance variant, while 'FH' indicates the specific tape-and-reel packaging format. It is part of a broader family including variants like UMZ7.5KFH and UMZ22KFH, offering different voltage ratings within the same package style.

Replacement Considerations

Direct replacements should match the dual common anode configuration, 6.8V Zener voltage, and UMD/SOT-343 package. Verify that substitute parts meet AEC-Q101 requirements if automotive use is intended. Cross-reference pinouts to ensure compatibility, as some generic arrays may differ in terminal arrangement.