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Product Detailed Parameters
- Description：DIODE ZENER 47V 500MW SQ-MELF
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：47 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：75 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 36 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 1N6340US is a military-qualified Zener voltage regulator diode designed for high-reliability applications. It features a voidless hermetically sealed glass package with internal metallurgical bonds. The device provides a nominal Zener voltage of 47V at a test current of 2.7mA, with a dynamic impedance of 75 ohms and a maximum reverse leakage current of 80µA at 150°C. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 0.5W.
Feature Summary
- Hermetically sealed voidless-glass construction with tungsten slugs
- Internal Category III metallurgical bond for enhanced reliability
- Qualified per MIL-PRF-19500/533 standards
- Inherently radiation hard
Applications
- High-reliability aerospace systems
- Military electronic circuits
- Voltage regulation in harsh environments
Procurement Notes
Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as these levels are available for this series. Confirm RoHS compliance status if applicable, noting that compliant versions are commercial grade only. Ensure the ordering suffix matches the desired voltage tolerance and packaging configuration before finalizing procurement.
Selection Notes
Select the 1N6340US when a 47V Zener reference is needed in a surface-mount Melf package. Consider the thermal resistance values (RθJEC and RθJA) for power derating calculations based on end-cap or ambient temperatures. Verify that the surge current rating and maximum operating voltage align with circuit requirements.
Part Context
This component belongs to the 1N6309US through 1N6355DUS series of 0.5-watt Zener diodes. The series offers a wide selection of voltages from 2.4V to 200V with various tolerance options. It serves as the surface-mount equivalent to the JEDEC registered axial-leaded 1N6309 through 1N6355 series.
Replacement Considerations
Direct replacements include other parts within the 1N6309US-1N6355US series from Microchip/Microsemi. Cross-reference with axial-leaded equivalents like 1N6340 if package changes are acceptable. Verify that substitute components meet the same MIL-PRF-19500/533 qualification and metallurgical bond category.
