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1N4742AUR
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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 1N4742AUR is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 12 V with a tolerance of 5%. The component operates in the SMD/SMT package DO-213AB-2 and dissipates up to 1 W of power. Key electrical parameters include a maximum reverse leakage current of 1 uA, a Zener impedance of 9 Ohms, and a test current of 21 mA. It supports a forward current of 200 mA and functions within a temperature range of -65 C to +175 C.
Feature Summary
- Provides stable voltage regulation with sharp reverse characteristics
- Features low reverse current levels for efficient operation
- Offers high reliability suitable for demanding environments
Applications
- Voltage stabilization circuits
- Absolute reference voltage generation
- General-purpose voltage regulation
Procurement Notes
Verify the specific suffix UR against official Microchip documentation to confirm surface-mount packaging and reel configuration. Ensure compatibility with DO-213AB-2 footprints during PCB layout. Confirm RoHS status and lead-free compliance requirements prior to ordering, as manufacturing specifications may vary by production batch.
Selection Notes
Select this component when a 12 V reference is required in a compact surface-mount form factor. Compare the 9 Ohm impedance and 1 uA leakage against circuit sensitivity requirements. Verify that the 1 W power dissipation rating aligns with thermal management capabilities in the target application environment.
Part Context
This device belongs to the standard 1N47xx series of Zener diodes manufactured by Microchip Technology. It serves as a surface-mount alternative to through-hole variants like the 1N4742A, maintaining identical electrical performance while adapting to automated assembly processes. The part is categorized under Diodes & Rectifiers within the broader semiconductor portfolio.
Replacement Considerations
Cross-reference with other manufacturers offering 1N4742A equivalents in DO-213AB packages. Verify pinout compatibility and thermal resistance values before substitution.
