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Product Detailed Parameters
- Description：DIODE ZENER 43V 500MW SQ-MELF
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Zener (Nom) (Vz)：43 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：65 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 33 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 1N6339US/TR is a surface-mount Zener voltage regulator in a voidless hermetically sealed glass Melf package. It provides a nominal Zener voltage of 43V with a standard tolerance of ±5%. The device operates at a steady-state power dissipation of 0.5W and features a maximum reverse current of 80µA at 25°C, increasing to 100µA at 150°C. Dynamic impedance is specified at 65 ohms at the test current of 3mA, with a surge current rating of 2.5A.
Feature Summary
- Hermetically sealed voidless-glass construction with internal metallurgical bonds for high reliability.
- Military qualification available per MIL-PRF-19500/533 standards.
- Inherently radiation hard and non-sensitive to electrostatic discharge.
- Surface mount equivalent of JEDEC registered axial-leaded series.
Applications
- High-reliability applications where failure cannot be tolerated.
- Voltage regulation over broad operating current and temperature ranges.
- Radiation-hardened circuit designs.
Procurement Notes
Verify the specific suffix configuration against official documentation to confirm exact tolerance, lead finish, and reliability level. Confirm RoHS compliance status as it varies by commercial grade availability. Ensure the tape and reel packaging matches EIA-481-B standards if required for automated assembly processes.
Selection Notes
Select this component for designs requiring robust surface-mount voltage regulation in harsh environments. Consider the thermal resistance values when calculating power derating curves for end-cap or ambient conditions. Verify that the 43V breakdown voltage aligns with the target circuit requirements within the specified tolerance range.
Part Context
This part 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. It serves as the surface-mount counterpart to the traditional axial-leaded DO-35 packages, maintaining identical electrical characteristics and reliability profiles in a compact form factor.
Replacement Considerations
Direct replacements include other manufacturers' equivalents of the 1N6339 series. For military specifications, verify JAN, JANTX, JANTXV, or JANS levels match the original requirement. Surface mount alternatives must maintain the same Melf package dimensions and hermetic sealing properties.
