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1N4686 TR TIN/LEAD
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Product Detailed Parameters
- Description：3.9V 500MW TH DIODE-ZENER SINGLE
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：3.9 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：-
- Current - Reverse Leakage @ Vr：5 µA @ 2 V
- Operating Temperature：-65°C ~ 200°C (TJ)
- Mounting Type：Through Hole
- Package / Case：DO-204AH, DO-35, Axial
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 100 mA
- Grade：-
- Qualification：-
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Overview
The Central Semiconductor Corp 1N4686 TR TIN/LEAD is a silicon planar Zener diode designed for voltage regulation and reference applications. It features a hermetically sealed glass construction in the DO-204AH (GLASS, CASE 299) package with two pins. The device provides a nominal Zener voltage of 3.9V with a tight tolerance of 1%. It is rated for a power dissipation of 0.5W and operates within a temperature range of -65°C to +200°C. The component utilizes metallurgically bonded construction with an isolated case connection.
Feature Summary
- Hermetically sealed glass construction for environmental protection
- High thermal stability with maximum operating temperature of 200°C
- Metallurgically bonded internal structure for reliability
- Isolated case connection for flexible mounting
Applications
- Precision voltage reference circuits
- Overvoltage protection in sensitive electronics
- Temperature-compensated Zener references
- Military and aerospace power supplies
Procurement Notes
Verify the specific suffix configuration against official datasheets to confirm lead content and packaging type. Ensure the procurement specification matches the required hermetic sealing standards for the intended application environment. Confirm that the DO-204AH package dimensions align with the target PCB layout constraints before finalizing orders.
Selection Notes
Select this component when high thermal endurance up to 200°C is required alongside precise voltage regulation. The 1% tolerance makes it suitable for applications demanding strict voltage accuracy. Consider the hermetic seal requirement for harsh environments where standard plastic packages may fail. Verify that the 0.5W power rating meets the thermal dissipation needs of the circuit design.
Part Context
This part belongs to the 1N4686 series of Zener diodes manufactured by Central Semiconductor Corp. The series is characterized by its robust glass encapsulation and high-temperature capability. The TR designation typically indicates tape and reel packaging, while TIN/LEAD specifies the terminal finish. This component serves as a reliable alternative to standard plastic-packaged Zeners in critical systems.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify electrical compatibility including Zener voltage, tolerance, and power dissipation if considering generic equivalents. Ensure replacement components meet the same hermetic sealing and temperature rating requirements.
