1N4742ATR

Overview

The onsemi 1N4742ATR is a single-channel general-purpose 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 a DO-41 through-hole package and supports a maximum power dissipation of 1 W. Key electrical parameters include a test current of 21 mA, a maximum Zener impedance of 9 Ω, and a maximum reverse leakage current of 5 μA. The component functions within an operating temperature range from -65°C to +200°C.

Feature Summary

• Provides stable voltage regulation using a sharp reverse characteristic profile.
• Features low reverse leakage current for improved circuit efficiency.
• Utilizes compression bonded construction for high stability and reliability.

Applications

• Voltage stabilization circuits
• Reference voltage generation
• Overvoltage protection

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm packaging configuration. Ensure the selected variant matches the required mechanical footprint and thermal characteristics for the target application environment.

Selection Notes

Select this component when a precise 12 V reference is required in a standard axial leaded package. Consider the 1 W power rating and wide temperature range for robust performance in industrial environments.

Part Context

This part belongs to the 1N47 series of silicon Zener diodes manufactured by onsemi. The series offers a broad range of voltage options within the same DO-41 form factor, facilitating standardized design practices across various electronic systems requiring reliable voltage regulation.

Replacement Considerations

Cross-reference with other manufacturers' 1N4742A equivalents. Verify that substitute parts meet the identical 12 V nominal voltage, 1 W power dissipation, and DO-41 package dimensions to ensure mechanical and electrical compatibility.