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1N4742AURE3/TR
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Product Detailed Parameters
- Description：DIODE ZENER 12V 1W DO213AB
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB (MELF) package. It provides a nominal Zener voltage of 12 V with a standard tolerance of +/- 5%. Electrical characteristics include a test current of 21 mA, maximum dynamic impedance of 9 Ohms at IZT, and a maximum reverse current of 1 uA at VR = 1 V. The device operates within a temperature range of -65°C to +175°C and features a hermetically sealed glass body.
Feature Summary
- Hermetically sealed glass MELF package for high reliability applications
- Surface mount design ideal for high density mounting
- Regulates voltage over a broad operating current and temperature range
- Inherently radiation hard
Applications
- Voltage regulation in high density circuits
- High reliability applications requiring source control drawings
- Low parasitic requirement designs
Procurement Notes
Verify the specific ordering suffix against manufacturer documentation to confirm compliance requirements. The 'e3' suffix indicates RoHS compliance, while 'TR' denotes tape and reel packaging. Confirm that the DO-213AB footprint matches your PCB layout guidelines. Ensure thermal derating curves are considered for steady-state power dissipation limits during integration.
Selection Notes
Select this component when a surface mount equivalent to the axial 1N4742A is required. The DO-213AB package offers a leadless profile suitable for automated assembly. Consider the 1.0 W power rating and wide temperature range for demanding environments. Verify that the 12 V breakdown voltage aligns with circuit regulation needs.
Part Context
This part belongs to the 1N4728AUR through 1N4764AUR series of surface mount 1.0 W 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, providing options for various voltage regulation standards in surface mount technology.
Replacement Considerations
The 1N4742A is the direct axial leaded equivalent. Surface mount alternatives may include other manufacturers' DO-213AB variants with matching electrical specifications. Verify pinout polarity and thermal resistance characteristics when substituting.
