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Product Detailed Parameters
- Description：DIODE ZENER 82V 500MW SQ-MELF
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Zener (Nom) (Vz)：82 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：220 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 62 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 1N6346US/TR is a Zener voltage regulator with an 82V nominal breakdown voltage and a standard 5% tolerance. It operates within a test current range of 1.5mA to 1.8A, featuring a dynamic impedance of 220 ohms at the specified test point. The device is housed in a voidless hermetically sealed glass B-SQ MELF package, rated for a steady-state power dissipation of 0.5W. It supports junction temperatures from -65°C to +175°C and includes internal metallurgical bonds.
Feature Summary
- Hermetically sealed voidless-glass construction with tungsten slugs
- Internal Category I metallurgical bond for enhanced reliability
- Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020
- Inherently radiation hard design
Applications
- High-reliability military applications requiring zero failure tolerance
- Voltage regulation over broad operating current and temperature ranges
- Over-voltage protection in small-scale high-density circuit designs
Procurement Notes
Verify the specific suffix configuration against the datasheet nomenclature to ensure correct voltage tolerance and RoHS compliance status. Confirm that the tape and reel packaging aligns with EIA-481-B standards. Cross-reference the manufacturing lot date code with the latest availability data provided by authorized distributors or the manufacturer directly.
Selection Notes
Select this component when a surface-mount equivalent to the axial-leaded 1N6346 series is required. Ensure the application demands a 0.5W power rating and can accommodate the specified thermal resistance values. Verify that the 82V breakdown voltage matches the circuit requirements and that the operating environment falls within the -65°C to +175°C temperature range.
Part Context
This part belongs to the 1N6309US through 1N6355DUS series of voidless hermetically sealed glass Zener diodes. The series is qualified per MIL-PRF-19500/533 and offers various reliability levels including JAN, JANTX, JANTXV, and JANS. The US suffix denotes the B-SQ MELF surface mount package variant.
Replacement Considerations
Direct replacements include other 1N6346 variants with different tolerance suffixes (e.g., 1N6346C for 2%, 1N6346D for 1%) or axial-leaded equivalents like 1N6346D. Verify package compatibility and thermal derating curves when substituting.
