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1N4757AURE3/TR
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Product Detailed Parameters
- Description：DIODE ZENER 51V 1W DO213AB
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：51 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：95 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 38.8 V
- Operating Temperature：-65°C ~ 150°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 1N4757AURE3/TR is a surface-mount Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 51V with a standard tolerance of 5%. The device is rated for a power dissipation of 1W and utilizes silicon as the semiconductor material. It is housed in the DO-213AB package, also known as MELF-2, which is a hermetically sealed glass encapsulation. This component is designed for high-reliability applications requiring low parasitic characteristics.
Feature Summary
- Hermetically sealed glass construction ensures environmental stability
- Surface mount design suitable for high-density circuit layouts
- Electrically equivalent to registered through-hole counterparts
Applications
- Voltage regulation in high-density electronic assemblies
- Circuits requiring low parasitic performance
- High reliability applications specified by source control drawings
Procurement Notes
Verify that the specific part number includes the correct suffixes for RoHS compliance and lead-free status. Confirm the package type matches the required JEDEC outline DO-213AB. Ensure the manufacturer is identified correctly as Microchip Technology or its relevant division. Check for any specific military screening levels if required by the application's source control drawing.
Selection Notes
Select this component when a surface-mount solution is needed for 1W Zener regulation. It serves as a direct replacement for the DO-41 packaged 1N4757A series while offering reduced parasitic effects. Consider the hermetic seal for harsh environments where plastic packages may be insufficient. Verify that the 5% voltage tolerance meets the circuit requirements.
Part Context
This device belongs to the 1N4728A through 1N4764A series of 1-watt Zener diodes. The 'UR' suffix typically denotes the surface-mount MELF package variant, while 'e3' indicates lead-free and RoHS compliance. These parts are widely used in industrial and commercial electronics where space constraints necessitate surface-mount technology.
Replacement Considerations
The 1N4757APE3 (DO-41 package) is the through-hole equivalent. The MLL4757AUR is a non-RoHS version of the same surface-mount device. Ensure substitution maintains the 51V Zener voltage and 1W power rating.
