1N4461US

Single Zener Diodes Overview

The Microchip Technology 1N4461US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 6.8 V and a steady-state power dissipation rating of 1.5 W at 25 °C ambient temperature. It utilizes a void-less hermetically sealed glass MELF (D-5A) package featuring an internal metallurgical bond. The device operates within a junction and storage temperature range of -65 °C to +175 °C, exhibits a maximum dynamic impedance of 2.5 Ohms at the test current of 37 mA, and maintains a maximum reverse leakage current of 5 µA.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using void-less hard glass with tungsten slugs and internal metallurgical bonding for robust reliability.
• Military qualification available per MIL-PRF-19500/406 across JAN, JANTX, JANTXV, and JANS levels.
• Inherently radiation hard and non-sensitive to electrostatic discharge as verified by MIL-STD-750 method 1020.

Single Zener Diodes Applications

• High-reliability applications where circuit failure cannot be tolerated
• Voltage regulation over broad operating current and temperature ranges
• Surface mount equivalents for JEDEC registered axial-lead series

Single Zener Diodes Procurement Notes

Verify the specific reliability level required, such as JAN, JANTX, JANTXV, or JANS, as these designations dictate the manufacturing lot traceability and testing standards. Confirm RoHS compliance status if applicable, noting that compliant versions are restricted to commercial grade only. Ensure the ordering suffix matches the desired tolerance and packaging configuration before finalizing procurement documentation.

Single Zener Diodes Selection Notes

Select this component when a 1.5 W surface mount Zener diode is required in a hermetically sealed glass package. The 1N4461US provides a 6.8 V reference point with standard 5% tolerance. Consider the D-5A MELF form factor for space-constrained designs needing high thermal stability and radiation hardness without sacrificing power handling capabilities found in larger through-hole packages.

Single Zener Diodes Part Context

This device belongs to the 1N4460US through 1N4496US series of void-less hermetically sealed surface mount Zener diodes. The series covers a wide voltage selection from 3.3 V to 200 V. The 1N4461US specifically serves as the 6.8 V variant within this lineup, sharing identical mechanical dimensions and thermal characteristics with its siblings while differing only in electrical breakdown parameters.

Single Zener Diodes Replacement Considerations

Direct replacements include other manufacturers' DO-41 axial equivalents or compatible surface mount Zener diodes rated for 1.5 W. Verify that substitute components meet the same hermetic sealing requirements and thermal resistance specifications if used in military or aerospace environments requiring MIL-PRF-19500/406 compliance.