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1N4744AUR/TR
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Product Detailed Parameters
- Description：DIODE ZENER 15V 1W DO213AB
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Zener (Nom) (Vz)：15 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：14 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 11.4 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 1N4744AUR/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB (MELF) package. It provides a nominal Zener voltage of 15 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse leakage current of 5 µA at 11.4 V. Electrical characteristics include a test current of 17 mA, a maximum dynamic impedance of 14 Ohms, and a maximum regulator current of 61 mA.
Feature Summary
- Hermetically sealed glass MELF package for high reliability
- Surface mount design suitable for high density mounting
- Inherently radiation hard per MicroNote 050
- ESD nonsensitive operation
Applications
- Voltage regulation in high density circuits
- Applications requiring low parasitic requirements
- High reliability applications specified by source control drawings
Procurement Notes
Verify that the ordering suffix TR indicates tape and reel packaging as defined in the datasheet. Confirm the manufacturer origin and specific revision level against the latest official documentation from Microchip or authorized distributors. Ensure compatibility with the DO-213AB footprint during procurement planning.
Selection Notes
Select this component when a surface mount equivalent to the axial 1N4744A is required. The DO-213AB package offers lower parasitics compared to through-hole alternatives. Verify that the 15 V Zener voltage and 1 W power dissipation meet the circuit's thermal and electrical constraints.
Part Context
This part belongs to the 1N4728AUR through 1N4764AUR series of surface mount glass Zener diodes. These devices are electrically equivalent to their JEDEC registered axial counterparts but utilize the DO-213AB outline. The series covers Zener voltages from 3.3 V to 100 V with various tolerance options.
Replacement Considerations
The 1N4744A is the direct axial leaded equivalent. Surface mount equivalents such as SMAJ4744A are also available. For hermetic versions, check for MSP prefixes like MSP1N4744AUR.
