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1N4742AURE3
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Product Detailed Parameters
- Description：DIODE ZENER 12V 1W DO213AB
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：12 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：9 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 9.1 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
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N4742AURE3 is a high-reliability Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 12 V with a 5% tolerance and operates within a wide temperature range from -65°C to +175°C. The device utilizes a hermetically sealed glass MELF (DO-213AB) package, ensuring durability in harsh environments. Key electrical characteristics include a maximum reverse leakage current of 1 µA at the test current of 21 mA and a Zener impedance of 9 Ohms. It dissipates up to 1 W of power and supports a forward current of 200 mA.
Feature Summary
- Hermetically sealed glass construction for enhanced environmental protection
- Extended operating temperature range suitable for extreme conditions
- High reliability design compliant with rigorous military standards
Applications
- Military aerospace electronic systems
- High-reliability industrial control circuits
- Harsh environment voltage regulation modules
Procurement Notes
Verify the specific suffix 'E3' confirms lead-free compliance and check the 'UR' designation for surface mount MELF packaging. Confirm RoHS status and hermetic sealing requirements against project specifications. Ensure the manufacturer source is Microchip Technology or authorized distributor to guarantee authenticity and traceability for critical applications.
Selection Notes
Select this component when a hermetically sealed, high-reliability Zener diode is required for space-constrained surface mount designs. The DO-213AB package offers robust performance compared to standard axial leads. Consider the 12 V nominal voltage and 1 W power dissipation limits to ensure compatibility with the target circuit's thermal and electrical constraints.
Part Context
This part belongs to the 1N4742 series of Zener diodes manufactured by Microchip Technology. It is an evolution of the classic 1N4742 specification, adapted for modern surface mount technology while maintaining the high-reliability standards associated with the original MIL-spec components. The series is widely recognized for stable voltage regulation in demanding applications.
Replacement Considerations
Direct substitutes include the 1N4742AUR and 1N4742AG. Verify that replacement parts match the hermetic sealing requirement and the DO-213AB package dimensions. Ensure the replacement maintains the same 12 V Zener voltage and 1 W power rating.
