1N4742AHR1G

Overview

The Taiwan Semiconductor 1N4742AHR1G is a single-channel voltage regulator diode with a nominal Zener voltage of 12 V and a maximum power dissipation of 1 W. It features a DO-41 through-hole package, a test current of 21 mA, and a maximum Zener impedance of 9 Ω. The device operates within a temperature range of -65°C to +200°C, with a maximum reverse leakage current of 5 μA and a voltage tolerance of ±5%.

Feature Summary

• Hermetically sealed glass construction for corrosion resistance
• Compression bonded design ensuring structural integrity
• Pure tin plated terminals compliant with MIL-STD-208 solderability standards

Applications

• Voltage stabilization circuits
• Reference voltage generation
• Overvoltage protection

Procurement Notes

Verify the specific suffix HR1G against official datasheets to confirm packaging format and compliance status. Confirm RoHS and REACH SVHC declarations directly with the manufacturer or authorized distributors. Ensure the procurement channel provides traceable documentation matching the Taiwan Semiconductor part number.

Selection Notes

Select this component for applications requiring a stable 12 V reference in through-hole designs. Verify that the 1 W power rating and 9 Ω impedance meet circuit requirements. Ensure the operating environment stays within the specified -65°C to +200°C temperature limits.

Part Context

This part belongs to the standard 1N47xx series of silicon Zener diodes manufactured by Taiwan Semiconductor. These components are designed for general-purpose voltage regulation and reference applications in electronic circuits.