1N4747A

Overview

The onsemi 1N4747A is a single-channel general-purpose Zener 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 of -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 passivation for environmental protection
• Designed for axial lead mounting via the DO-41 package

Applications

• Voltage reference circuits
• Overvoltage protection
• Clipping and clamping applications

Procurement Notes

Verify the specific manufacturer source, as the 1N4747A designation is utilized by multiple vendors including onsemi, Taiwan Semiconductor, STMicroelectronics, and Continental Device India Limited. Confirm that the selected unit matches the required electrical tolerances and package dimensions. Ensure compliance with relevant RoHS and REACH directives applicable to your region before finalizing procurement.

Selection Notes

Select this component when a precise 20 V reference is required in through-hole designs. The 1 W power rating allows for moderate current handling in standard regulatory roles. Consider the ±5% tolerance for applications requiring tighter precision, or evaluate alternative packages if space constraints exist. Verify thermal management requirements given the wide operating temperature range.

Part Context

This component belongs to the 1N47 series of silicon Zener diodes. These devices are standardized for general-purpose voltage regulation tasks. The DO-41 package provides a robust mechanical structure suitable for manual soldering and automated insertion processes commonly found in industrial and consumer electronics manufacturing.

Replacement Considerations

Cross-reference with other manufacturers' 1N4747A parts such as those from Taiwan Semiconductor or STMicroelectronics. Ensure pinout compatibility and verify that dynamic impedance and leakage current specifications meet the circuit requirements.