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1N4738AUR/TR
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Product Detailed Parameters
- Description：DIODE ZENER 8.2V 1W DO213AB
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Zener (Nom) (Vz)：8.2 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：4.5 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 6 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 1N4738AUR/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB package. It provides an 8.2 V nominal Zener voltage with a standard +/-5% tolerance. Key electrical parameters include a maximum dynamic impedance of 4.5 Ohms at a test current of 31 mA, and a maximum reverse leakage current of 10 uA. The device operates within a temperature range of -65°C to +175°C and features a hermetically sealed glass MELF construction.
Feature Summary
- Hermetically sealed glass MELF package for high reliability
- Surface mount design suitable for high density mounting
- Electrically equivalent to JEDEC registered 1N47 series
Applications
- Voltage regulation in high density circuits
- Applications requiring low parasitic requirements
- High reliability applications specified by source control drawings
Procurement Notes
Verify the specific manufacturer origin, as this part number may be sourced from Microsemi or Microchip Technology. Confirm RoHS compliance status if required, noting that the 'e3' suffix indicates compliance while other variants may not. Ensure the 'TR' suffix matches the required tape and reel packaging specifications for automated assembly processes.
Selection Notes
Select this component when a surface mount solution is needed for 1W Zener regulation. It serves as a direct replacement for through-hole 1N4738A devices where board space is limited. Consider the DO-213AB outline for its leadless profile and inherent radiation hardness properties compared to plastic packages.
Part Context
This component belongs to the 1N4728AUR through 1N4764AUR series of surface mount glass Zener diodes. Manufactured under the Scottsdale Division lineage, these parts bridge the gap between traditional axial-leaded components and modern SMT requirements while maintaining hermetic sealing capabilities.
Replacement Considerations
Direct surface mount equivalents are available in the SMAJ4728A to SMAJ4764A series. For through-hole replacements, the standard 1N4728A through 1N4764A registration in the DO-41 package is electrically similar.
