1N4730A-T50A-FS

Overview

The 1N4730A-T50A-FS is a single silicon Zener diode manufactured by Fairchild Semiconductor, now part of onsemi. It features a nominal Zener voltage of 3.9 V with a tolerance of ±5%. The device is rated for a power dissipation of 1 W and operates in the DO-41 through-hole package. Key electrical characteristics include a maximum reverse leakage current of 50 µA at 1 V and a Zener impedance of 9 Ohms. It is designed for applications requiring stable voltage regulation within standard industrial temperature ranges.

Feature Summary

• Provides precise voltage regulation at 3.9 V with tight manufacturing tolerances
• Capable of handling 1 W power dissipation for robust performance
• Utilizes a standard DO-41 axial leaded package for easy integration

Applications

• Voltage reference circuits in analog signal processing
• Overvoltage protection for sensitive electronic components
• Clamping applications in power supply output stages

Procurement Notes

Verify manufacturer lineage as Fairchild Semiconductor was acquired by onsemi; ensure datasheet references align with current onsemi documentation. Confirm package integrity and lead finish specifications match design requirements. Check for RoHS compliance status if environmental regulations apply to the final assembly. Validate that the T50A suffix corresponds to the specific tape and reel configuration required for automated placement processes.

Selection Notes

Select this component when a 3.9 V regulated reference is needed with moderate power handling capabilities. The DO-41 package suits manual or semi-automated assembly lines where surface mount options are not feasible. Consider the 5% tolerance if tighter voltage precision is not critical for the application. Ensure the operating temperature range meets the environmental conditions of the end-use device.

Part Context

This component belongs to the 1N4730 series of one-watt Zener diodes, a legacy product line originally developed by Fairchild Semiconductor. Following the acquisition of Fairchild by onsemi, production and support have transitioned under the onsemi brand. The 1N4730A variant specifically denotes the 3.9 V version within this high-power Zener family, widely used in established industrial and consumer electronics designs.

Replacement Considerations

Direct equivalents include the 1N4730A from other manufacturers such as Micro Commercial Components (MCC) or Nexperia, provided they meet the same 3.9 V, 1 W, and DO-41 specifications. Verify pinout compatibility and thermal characteristics before substitution.