1N4461US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4461US/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 6.8 V and a test current of 37 mA. It operates within a junction temperature range of -65 °C to +175 °C and dissipates up to 1.5 W at 25 °C ambient. The device features a maximum dynamic impedance of 2.5 Ohms, a reverse leakage current of 5 µA, and a forward voltage of 1.0 V at 200 mA. It utilizes a D-5A-2 (MELF) package with a voidless hermetically sealed glass construction.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass package with internal metallurgical bonds for robust construction
• Triple-layer passivation providing inherent radiation hardness and ESD protection
• Military qualification available per MIL-PRF-19500/406 for high-reliability applications

Single Zener Diodes Applications

• Voltage regulation in high-reliability military systems
• Reference voltage generation in harsh environments
• Transient voltage suppression circuits requiring radiation tolerance

Single Zener Diodes Procurement Notes

Verify the specific reliability level required, as commercial versions lack military qualification suffixes. Confirm RoHS compliance status, noting that lead-free matte tin terminations are available only on commercial grade devices. Ensure the ordering suffix matches the desired tolerance and termination material specifications defined in the datasheet nomenclature section.

Single Zener Diodes Selection Notes

Select this component when a standard JEDEC equivalent is needed in a surface mount form factor. Consider the 1.5 W power dissipation capability and wide operating temperature range for thermal management. Evaluate the 5% standard tolerance against tighter 1% or 2% options if higher precision is required for the circuit design.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of 1.5 Watt Zener diodes. These components serve as surface mount equivalents to traditional axial-lead packages while offering superior mechanical stability. The series covers a broad voltage range from 3.3 V to 200 V, catering to diverse voltage regulation needs in industrial and aerospace sectors.

Single Zener Diodes Replacement Considerations

Direct replacements include other manufacturers' DO-41 or MELF equivalents with matching 6.8 V Zener voltage and 1.5 W power rating. Verify package dimensions and terminal compatibility before substitution.