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1N4686UR-1
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Product Detailed Parameters
- Description：DIODE ZENER 3.9V 500MW DO213AA
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- 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 ~ 175°C
- Mounting Type：Surface Mount
- Package / Case：DO-213AA
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 100 mA
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N4686UR-1 is a surface-mount Zener diode designed for voltage regulation applications. It features a DO-213AA (MELF) hermetically sealed glass package, providing a robust alternative to traditional axial leads. The device operates within an extended temperature range of -65°C to +175°C and dissipates up to 500 mW of power. It offers standard 5% tolerance on the Zener voltage, ensuring reliable performance in demanding electronic circuits.
Feature Summary
- Hermetically sealed glass MELF package for environmental protection
- Extended operating temperature range suitable for harsh conditions
- Surface mount design for automated assembly processes
Applications
- Voltage regulation in aerospace systems
- Overvoltage protection in industrial electronics
- Reference voltage sources in precision instrumentation
Procurement Notes
Verify the specific suffix UR-1 against official datasheets to confirm hermetic sealing requirements. Ensure compatibility with MIL-PRF-19500 standards if applicable. Confirm RoHS status as commercial versions may differ from military-grade equivalents. Validate package dimensions against PCB footprint specifications before integration.
Selection Notes
Select this component when a hermetically sealed surface-mount Zener diode is required. The DO-213AA package facilitates high-reliability designs where leaded components are unsuitable. Consider the 500 mW power dissipation capability for thermal management. Verify that the 5% tolerance meets the circuit's voltage regulation accuracy requirements.
Part Context
This part belongs to the 1N4678 through 1N4717 series of 0.5 W Zener voltage regulators. The UR-1 suffix denotes the surface-mount MELF variant, which serves as the equivalent to the axial-leaded DO-35 packages. This series provides a wide selection of voltages with tight tolerances and low test currents for stable operation.
Replacement Considerations
Direct substitutes include other manufacturers' DO-213AA Zener diodes with matching voltage and power ratings. Verify pinout orientation and hermetic sealing specifications. Ensure thermal characteristics align with the original design constraints.
