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1N4687/TR
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Product Detailed Parameters
- Description：DIODE ZENER 4.3V 500MW DO7
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：4.3 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：-
- Current - Reverse Leakage @ Vr：4 µA @ 2 V
- Operating Temperature：-65°C ~ 175°C (TJ)
- Mounting Type：Through Hole
- Package / Case：DO-204AA, DO-7, Axial
- Voltage - Forward (Vf) (Max) @ If：1.1 V @ 200 mA
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N4687/TR is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 4.3 V with a standard tolerance of 5%. The device operates in the DO-7-2 through-hole package and dissipates up to 500 mW of power. Key electrical characteristics include a maximum reverse leakage current of 7.5 uA at the test current of 50 uA, a forward voltage of 1.1 V, and a maximum forward current of 200 mA. It supports an operating temperature range from -65 C to +175 C.
Feature Summary
- Provides stable voltage regulation via Zener breakdown mechanism
- Capable of handling moderate power dissipation for signal conditioning
- Designed for reliable operation across extended industrial temperature ranges
Applications
- Voltage reference circuits requiring low test current stability
- Overvoltage protection stages in sensitive electronic systems
- Biasing networks for transistor amplifiers
Procurement Notes
Verify the specific suffix /TR indicates reel packaging configuration against official Microchip documentation before ordering. Confirm that the 5% tolerance aligns with circuit requirements. Ensure the DO-7-2 through-hole footprint matches the target PCB layout. Validate compliance with RoHS directives if required by the end application standards.
Selection Notes
Select this component when a precise 4.3 V reference is needed with minimal quiescent current draw. The low test current specification makes it suitable for battery-powered or energy-efficient designs. Compare the 500 mW power rating against expected thermal loads to ensure safe operation within the specified junction temperature limits.
Part Context
This part belongs to the standard 1N468x series of glass-passivated silicon Zener diodes manufactured by Microchip Technology. These components are widely used in general-purpose electronics for their predictable voltage regulation characteristics. The 1N4687 variant specifically targets the 4.3 V segment of the voltage regulator market.
Replacement Considerations
Cross-reference with other manufacturers' 1N4687 equivalents such as those from Vishay or Central Semiconductor. Verify pinout compatibility and package dimensions (DO-7) to ensure mechanical fit. Check if alternative suppliers offer tighter voltage tolerances or different packaging options like bulk instead of reel.
