1N4747A R1G

Overview

The Taiwan Semiconductor 1N4747A R1G is a single-channel voltage regulator diode housed in a DO-41 through-hole package. It features a nominal Zener voltage of 20 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range from -65°C to +200°C. Key electrical parameters include a test current of 12.5 mA, a maximum Zener impedance of 22 Ω, and a maximum reverse leakage current of 5 μA.

Feature Summary

• Provides stable voltage regulation at a nominal 20 V reference level
• Utilizes glass passivated junction technology for reliability
• Designed for high thermal stability with an extended operating temperature range

Applications

• Voltage reference circuits
• Overvoltage protection stages
• General-purpose voltage regulation

Procurement Notes

Verify the specific manufacturer designation when sourcing this component, as the 1N4747A part number is utilized by multiple semiconductor manufacturers including onsemi, Vishay, and STMicroelectronics. Confirm that the supplier provides documentation specifically from Taiwan Semiconductor Corporation to ensure the correct material specifications and manufacturing standards are met for your application requirements.

Selection Notes

Select this component for applications requiring a standard 20 V regulation point in through-hole designs. Ensure the circuit design accommodates the specified 1 W power dissipation limit and the 22 Ω dynamic impedance characteristics. Verify that the operating environment remains within the stated -65°C to +200°C temperature range to maintain performance integrity.

Part Context

This component belongs to the standard 1N47 series of silicon planar power Zener diodes. These devices are widely recognized for their robust construction and consistent performance in general electronic applications. The DO-41 axial leaded package facilitates easy integration into printed circuit boards using standard mounting techniques.

Replacement Considerations

Direct substitutes include the 1N4747A manufactured by onsemi, Vishay Semiconductors, and STMicroelectronics. When replacing, verify that the alternative source maintains the same DO-41 package dimensions and meets the identical 20 V, 1 W, and 5% tolerance specifications.