1N4749A R1G

Overview

The 1N4749A R1G is a single silicon Zener diode manufactured by Taiwan Semiconductor Corporation. It features a nominal Zener voltage of 24 V with a tolerance of ±5%. The device is designed for through-hole mounting in a DO-41 axial glass package. Key electrical specifications include a maximum power dissipation of 1 W, a test current of 10.5 mA, and a maximum reverse leakage current of 5 µA. The unit operates within a temperature range of -55 °C to +150 °C.

Feature Summary

• Provides stable voltage regulation at a nominal 24 V level
• Utilizes hermetically sealed glass passivation for environmental protection
• Supports high thermal stability across an extended operating temperature range

Applications

• Low voltage stabilizers
• Voltage reference circuits
• Overvoltage protection stages

Procurement Notes

Verify the specific suffix 'R1G' against official Taiwan Semiconductor documentation to confirm reel packaging details and compliance status. Ensure the requested component matches the standard 1N4749A electrical profile. Cross-reference datasheets for any manufacturing changes or RoHS/REACH declarations prior to final procurement decisions.

Selection Notes

Select this component when a 24 V Zener diode with ±5% tolerance is required for through-hole applications. Consider the 1 W power dissipation limit and the DO-41 package dimensions during PCB layout. Verify that the 5 µA maximum reverse leakage current meets the circuit's isolation requirements.

Part Context

This part belongs to the 1N4749A series of low voltage regulator diodes. These devices are widely used in general-purpose electronics requiring reliable voltage clamping. The series typically includes multiple voltage ratings from 3.3 V to higher values, all sharing similar physical package characteristics and power handling capabilities.

Replacement Considerations

Compatible substitutes include the 1N4749A from manufacturers such as NXP, Vishay, and Continental Device India Limited. Ensure replacement parts maintain the same 24 V nominal voltage, 1 W power rating, and DO-41 axial package form factor.