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Product Detailed Parameters
- Description：DIODE ZENER 75V 500MW SQ-MELF
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：75 V
- Tolerance：±1%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：180 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 56 V
- Operating Temperature：-65°C ~ 175°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SQ-MELF, B
- Voltage - Forward (Vf) (Max) @ If：1.4 V @ 1 A
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N6345DUS is a Zener voltage regulator diode designed for high-reliability applications. It features a 75V nominal Zener voltage and operates within a power rating of 0.5W. The component utilizes a voidless hermetically sealed glass package with internal metallurgical bonds, ensuring durability in harsh environments. Qualified per MIL-PRF-19500/533, it offers standard 5% tolerance options and is available in axial leaded packages suitable for demanding industrial and aerospace circuits.
Feature Summary
- Hermetically sealed voidless-glass construction for environmental protection
- Internal metallurgical bonding for enhanced mechanical stability
- Military qualification compliant with MIL-PRF-19500/533 standards
Applications
- High-reliability aerospace systems
- Defense electronics requiring failure intolerance
- Industrial control circuits in harsh environments
Procurement Notes
Verify the specific suffix 'DUS' against official datasheets to confirm package type and tolerance level. Ensure procurement channels provide traceability documentation required for military-grade components. Confirm RoHS status as these legacy qualified parts may have specific compliance declarations distinct from commercial equivalents.
Selection Notes
Select this component when hermetic sealing and voidless glass construction are mandatory for circuit longevity. Compare tolerance requirements against available 1%, 2%, and 5% options within the 1N6309 through 1N6355 series. Ensure thermal management aligns with the 0.5W power dissipation limit in the intended operating environment.
Part Context
This part belongs to the industry-recognized 1N6309 through 1N6355 series of 0.5W Zener voltage regulators. Manufactured by Microchip (formerly Microsemi), the series provides stable voltage reference solutions. The DUS designation indicates a specific package and tolerance configuration within this broader family of axial leaded, hermetically sealed diodes.
Replacement Considerations
Cross-reference with other manufacturers offering MIL-PRF-19500/533 qualified Zener diodes. Verify pinout compatibility and thermal characteristics before substituting with commercial grade equivalents lacking hermetic sealing.
