1N4743A-T

Overview

The Diodes Incorporated 1N4743A-T is a single Zener diode with a nominal voltage of 13V and a standard tolerance of ±5%. It features a power dissipation rating of 1.0W at 25°C, derating to 6.67 mW/°C above this temperature. The device utilizes a DO-41 glass case with a cathode band marking and operates within a junction temperature range of -65°C to +175°C. Electrical characteristics include a maximum Zener impedance of 10Ω at the test current of 19mA and a maximum reverse leakage current of 5µA at 9.9V.

Feature Summary

• Provides stable voltage regulation in a compact axial leaded package
• Features a glass encapsulation for high thermal stability and reliability
• Designed for surface mount or through-hole applications via tape and reel packaging

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection for sensitive electronic components
• Clamping applications in signal processing paths

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format, as the datasheet distinguishes between Ammo Pack (-A) and Tape & Reel (-T). Confirm RoHS compliance status and check for any recent Product Change Notifications (PCNs) regarding material or manufacturing site updates before finalizing procurement plans.

Selection Notes

Select this component when a 13V regulation point is required with a 1W power handling capability. Ensure the application environment stays within the specified operating temperature range. Consider the thermal resistance characteristics if ambient temperatures exceed 50°C to maintain safe junction temperatures during operation.

Part Context

This part belongs to the 1N4728A through 1N4761A series of 1.0W Zener diodes manufactured by Diodes Incorporated. The series covers a wide voltage range from 3.3V to 75V, offering standardized tolerances and mechanical dimensions across multiple voltage options for consistent design integration.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4743A variants in the DO-41 package. Verify electrical equivalence, specifically the 13V Zener voltage, 1W power rating, and ±5% tolerance, to ensure compatibility with existing circuit designs.