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1N4746AUR
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Product Detailed Parameters
- Description：DIODE ZENER 18V 1W DO213AB
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：18 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：20 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 13.7 V
- Operating Temperature：-65°C ~ 175°C
- Mounting Type：Surface Mount
- Package / Case：DO-213AB, MELF (Glass)
- Voltage - Forward (Vf) (Max) @ If：1.2 V @ 200 mA
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Overview
The Microchip Technology 1N4746AUR is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 18 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within an extended temperature range from -65°C to +200°C. Packaged in the DO-213AB (MELF) form factor, it utilizes a hermetically sealed glass construction suitable for high-reliability environments.
Feature Summary
- Hermetically sealed glass MELF package ensures environmental protection and long-term stability
- Extended operating temperature range supports operation in extreme thermal conditions
- High-reliability design intended for demanding electronic applications
Applications
- Voltage reference circuits requiring stable regulation
- Overvoltage protection systems
- Clamping applications in sensitive electronics
Procurement Notes
Verify the specific suffix 'AUR' against official Microchip documentation to confirm lead-free status and RoHS compliance, as historical data indicates variations within the 1N4746 family. Confirm the package type matches DO-213AB requirements. Ensure the procurement channel provides traceability for high-reliability specifications.
Selection Notes
Select this component when a hermetically sealed surface-mount Zener diode is required for high-reliability designs. The 18 V rating and 1 W power dissipation define its operational limits. Compare against through-hole alternatives like the 1N4746A if packaging constraints differ. Verify that the ±5% tolerance meets circuit precision requirements.
Part Context
This part belongs to the standard 1N47xx series of Zener diodes manufactured by Microchip Technology. While many variants use axial leads, the AUR suffix denotes a specific surface-mount configuration. This series is widely recognized for providing reliable voltage regulation across various industrial and commercial sectors.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source material. Cross-reference with other manufacturers offering DO-213AB packaged 18V 1W Zener diodes only after verifying electrical parameters and reliability standards.
