1N4741ATR

Overview

The Fairchild Semiconductor 1N4741ATR is a through-hole Zener diode housed in the DO-204AL (DO-41) package. It features a nominal Zener voltage of 11V with a tolerance of ±5%. The device supports a power dissipation of 1W and operates within a temperature range of -65°C to 200°C. Key electrical specifications include a maximum impedance of 8 Ohms and a reverse leakage current of 5 µA at 8.4V.

Feature Summary

• Provides stable voltage regulation via Zener breakdown characteristics
• Designed for high-temperature operation up to 200°C
• Utilizes a hermetically sealed glass DO-204AL axial leaded package

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in power supply inputs
• Clamping applications in signal conditioning paths

Procurement Notes

Verify the manufacturer designation, as this component type is widely produced by multiple vendors including ON Semiconductor and Microsemi. Confirm that the specific suffix 'TR' corresponds to tape and reel packaging if required for automated assembly. Ensure the DO-204AL package style matches the target PCB footprint before finalizing procurement orders.

Selection Notes

Select this component when a standard 11V regulation point is needed in a through-hole design. The wide operating temperature range makes it suitable for industrial environments. Compare the 8 Ohm impedance against load requirements to ensure adequate regulation under varying current conditions. Verify compatibility with existing thermal management strategies given the 1W power rating.

Part Context

This part belongs to the standard 1N47xxA series of Zener diodes, which are industry-standard components for basic voltage regulation. The 'A' suffix typically denotes a 5% tolerance band. Variants such as 1N4741AH or MX1N4741AG exist with different packaging or qualification standards but share similar core electrical parameters.

Replacement Considerations

Direct substitutes include 1N4741A from other manufacturers like ON Semiconductor or Vishay. For surface mount needs, equivalent Melf packages such as 1N4741AUR may be considered if adapter footprints are available. Always verify pinout orientation and thermal resistance differences when swapping between axial and SMD variants.