1N4747A

Overview

The SMC Diode Solutions 1N4747A is a single silicon planar Zener diode designed for voltage regulation applications. 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 of -65 °C to +200 °C. Key electrical parameters include a test current of 12.5 mA, a maximum reverse leakage current of 5 µA, and a Zener impedance of 22 Ω. It utilizes the DO-41 axial through-hole package.

Feature Summary

• Maintains stable voltage output under varying current and temperature conditions
• Utilizes glass-passivated silicon planar construction for reliability
• Designed for general-purpose voltage regulation tasks

Applications

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

Procurement Notes

Verify manufacturer authenticity as multiple entities produce this standard part number. Confirm specific datasheet revisions and RoHS compliance status directly with the supplier. Ensure the DO-41 package dimensions match design requirements. Check for any specific testing current variations in official documentation before integration.

Selection Notes

Select this component when a 20 V regulation point is required in through-hole designs. Consider the 1 W power rating and thermal resistance limits during circuit layout. Verify that the 5% voltage tolerance meets system accuracy needs. Evaluate the operating temperature range against environmental constraints.

Part Context

This component belongs to the 1N47 series of power Zener diodes. It shares functional characteristics with other industry-standard parts like the 1N4747A from onsemi or Nexperia. The designation follows JEDEC standards for axial leaded voltage regulator diodes.

Replacement Considerations

Direct substitutes include the 1N4747A from onsemi, Nexperia, Vishay, and STMicroelectronics. Cross-referencing datasheets is necessary to confirm identical pinout and thermal performance.