1N4742UR

Overview

The Microchip Technology 1N4742UR is a Zener diode with a nominal voltage of 12V and a power dissipation rating of 1W. It utilizes an axial-lead DO-41 package, suitable for through-hole mounting. The device features a maximum reverse leakage current of 5µA at its rated voltage and a test current of 21mA. It operates within a temperature range of -65°C to +175°C junction temperature. The component is designed for voltage regulation and reference applications in electronic circuits.

Feature Summary

• Provides stable voltage regulation at 12V nominal level
• Capable of handling 1W power dissipation
• Operates reliably across extended temperature ranges up to 175°C

Applications

• Voltage regulation in power supply circuits
• Voltage reference sources
• Overvoltage protection

Procurement Notes

Verify the specific suffix 'UR' against official Microchip documentation to confirm exact manufacturing lot or tape-and-reel specifications if applicable. Ensure compatibility with DO-41 footprint requirements. Cross-reference datasheet electrical characteristics for precise thermal and electrical limits before integration.

Selection Notes

Select this component when a 12V Zener reference with 1W capability is required. Consider the DO-41 package size for board space constraints. Verify that the operating current remains within the specified test conditions to maintain accuracy. Evaluate thermal management needs given the 1W dissipation rating.

Part Context

This part belongs to the standard Zener diode family from Microchip Technology. It serves as a discrete semiconductor device for maintaining constant voltage levels. The 1N47xx series is widely recognized for general-purpose regulation tasks in industrial and consumer electronics.

Replacement Considerations

Check for direct equivalents such as 1N4742A from other manufacturers ensuring identical 12V, 1W, and DO-41 specifications. Verify pinout and thermal characteristics match before substitution.