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Product Detailed Parameters
- Description：DIODE ZENER 62V 500MW SQ-MELF
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：62 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：125 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 47 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 1N6343US/TR is a surface-mount Zener voltage regulator in the B-SQ MELF package. It provides a nominal Zener voltage of 62 V with a standard tolerance of ±5%. The device operates at a test current of 2 mA and exhibits a dynamic impedance of 125 Ohms. It supports a maximum steady-state power dissipation of 0.5 W and functions within a junction temperature range of -65°C to +175°C.
Feature Summary
- Hermetically sealed voidless glass construction with internal metallurgical bonds for high reliability.
- Qualified per MIL-PRF-19500/533 standards for military-grade applications.
- Inherently radiation hard and non-sensitive to electrostatic discharge.
- Surface mount equivalent of the JEDEC registered 1N6309 series.
Applications
- High-reliability circuits where failure cannot be tolerated.
- Voltage regulation over broad operating current and temperature ranges.
- Radiation-hardened electronic systems.
Procurement Notes
Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as these levels dictate qualification standards. Confirm RoHS compliance status, noting that compliant versions are available only on commercial grades. Ensure the tape and reel packaging aligns with EIA-481-B standards before procurement.
Selection Notes
Select this component when a robust, hermetically sealed surface-mount Zener diode is needed for critical environments. Consider the 125 Ohm dynamic impedance and 0.5 W power rating against circuit requirements. Verify thermal derating curves if operating near the maximum junction temperature limits.
Part Context
This part belongs to the 1N6309US through 1N6355DUS series of 0.5 watt Zener voltage regulators. The series offers selections from 2.4 to 200 volts with various tolerance options. It serves as the surface-mount alternative to axial-leaded packages while maintaining identical electrical characteristics and reliability profiles.
Replacement Considerations
Equivalent parts include JAN1N6343, JANTX1N6343, JANTXV1N6343, and JANS1N6343. These variants share the same electrical specifications but differ in their specific military qualification levels and testing rigor.
FAQ
What is the reverse leakage current specification?
The maximum reverse current is 10 µA at 25°C and 80 µA at 150°C.
How is polarity indicated on the package?
Polarity is indicated by a band on the cathode end of the device.
