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1N4742
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Product Detailed Parameters
- Description：DIODE ZENER 12V 1W DO204AL
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：12 V
- Tolerance：±10%
- Power - Max：1 W
- Impedance (Max) (Zzt)：9 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 9.1 V
- Operating Temperature：-65°C ~ 150°C
- Mounting Type：Through Hole
- Package / Case：DO-204AL, DO-41, Axial
- Voltage - Forward (Vf) (Max) @ If：1.2 V @ 200 mA
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N4742 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 device operates in an axial DO-41 package and supports a power dissipation of 1 W. Key electrical characteristics include a maximum reverse leakage current of 1 uA, a Zener impedance of 9 Ohms at a test current of 21 mA, and a forward voltage of 1.2 V. It withstands a maximum operating temperature of +175 C and a minimum of -65 C.
Feature Summary
- Provides stable voltage regulation through precise Zener breakdown characteristics.
- Capable of handling high thermal loads with extended temperature range operation.
- Offers low leakage current to maintain circuit efficiency.
Applications
- Voltage reference circuits
- Overvoltage protection stages
- Power supply regulation
Procurement Notes
Verify the specific suffix (e.g., agE3) against the datasheet to confirm RoHS compliance and lead-free status. Confirm package type matches design requirements. Check manufacturer lifecycle status for availability. Ensure ordering quantities align with bulk or reel packaging constraints specified by the supplier.
Selection Notes
Select this component when a 12 V regulation point is required in a through-hole assembly. Evaluate the 1 W power rating against expected thermal conditions. Compare Zener impedance and leakage specifications against circuit sensitivity requirements. Ensure the DO-41 footprint fits the PCB layout constraints.
Part Context
This part belongs to the standard 1N47xx series of Zener diodes manufactured by Microchip Technology. It serves as a fundamental discrete semiconductor component for analog and digital circuit protection. The series is widely recognized for its reliability in industrial and commercial electronics applications requiring stable voltage references.
Replacement Considerations
Cross-reference with other manufacturers' 1N4742 equivalents. Verify pinout compatibility and thermal performance metrics before substitution. Ensure replacement parts meet the same 12 V nominal voltage and 1 W power dissipation ratings.
