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1N4742A-T50A
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Product Detailed Parameters
- Description：DIODE ZENER 12V 1W DO41
- Series：-
- Mfr：onsemi
- Package：Cut Tape (CT),Tape & Box (TB)
- 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 ~ 200°C
- Mounting Type：Through Hole
- Package / Case：DO-204AL, DO-41, Axial
- Voltage - Forward (Vf) (Max) @ If：-
- Grade：-
- Qualification：-
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Overview
The onsemi 1N4742A-T50A is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 12 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within a temperature range of -65 °C to +200 °C. Packaged in the DO-41 axial through-hole format, it exhibits a maximum reverse leakage current of 5 µA and a Zener impedance of 9 Ω at a test current of 21 mA.
Feature Summary
- Provides stable voltage regulation using a unidirectional silicon junction structure.
- Features a robust glass case package suitable for high-temperature environments up to 200 °C.
- Offers tight voltage tolerance for precise reference applications.
Applications
- Voltage stabilization circuits
- Absolute voltage references
- Overvoltage protection
Procurement Notes
Verify the specific suffix T50A against official datasheets to confirm packaging details, as standard 1N4742A parts may differ in reel specifications. Ensure compatibility with existing board layouts for the DO-41 form factor. Cross-reference RoHS compliance status directly with manufacturer documentation prior to integration.
Selection Notes
Select this component when a 12 V regulated supply is required in a through-hole configuration. Consider the 1 W power rating and thermal derating requirements for ambient temperatures exceeding 50 °C. Verify that the 9 Ω impedance meets circuit sensitivity needs compared to lower impedance alternatives.
Part Context
This part belongs to the 1N47xx series of Zener diodes, widely used for general-purpose voltage regulation. The 1N4742A variant specifically targets the 12 V segment of this family. The T50A suffix typically denotes tape-and-reel packaging for automated assembly, distinguishing it from bulk-packaged equivalents.
Replacement Considerations
Equivalent parts include the 1N4742A from other manufacturers such as Taiwan Semiconductor or Formosa MS. Verify pinout compatibility and ensure the replacement maintains the same DO-41 package dimensions and electrical characteristics.
