1N4744AHR1G

Overview

The 1N4744AHR1G is a silicon planar Zener diode manufactured by Taiwan Semiconductor. It provides a nominal voltage of 15 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. It features a low reverse leakage current of 5 µA and a dynamic impedance of 14 Ω at the test current of 17 mA. The component utilizes a DO-41 axial leaded package designed for through-hole mounting.

Feature Summary

• Hermetically sealed glass construction using metallurgical bonding for enhanced reliability
• Double slug type design providing high surge current capability
• Oxide passivated die structure ensuring stable electrical performance

Applications

• Voltage regulation in high-reliability electronic circuits
• Overvoltage protection for sensitive semiconductor components
• Reference voltage sources in precision measurement equipment

Procurement Notes

Verify the specific suffix HR1G against official datasheets to confirm hermetic sealing and metallurgical bond requirements. Ensure the procurement channel provides traceable documentation for aerospace or automotive qualification standards if applicable. Confirm RoHS compliance status directly with the manufacturer as packaging variations may exist.

Selection Notes

Select this component when hermetic sealing and extended temperature operation up to 200 °C are mandatory. The DO-41 package suits applications requiring robust mechanical stability and high thermal dissipation. Verify that the 15 V breakdown voltage aligns with circuit requirements and that the 1 W power rating accommodates peak load conditions without derating issues.

Part Context

This part belongs to the 1N47xxA series of 1 W Zener diodes produced by Taiwan Semiconductor. The series offers various voltage options within the standard JEDEC numbering system. The HR1G suffix specifically denotes the hermetically sealed variant, distinguishing it from commercial plastic-packaged equivalents in the same family.

Replacement Considerations

Cross-reference with other manufacturers' hermetically sealed 1N4744A variants such as those from Microchip or Vishay. Ensure substitute parts maintain the DO-41 package dimensions and metallurgical bond specifications to preserve form, fit, and function in existing assemblies.