1N4743G

Overview

The 1N4743G is a single-die Zener diode from the Taiwan Semiconductor 1W series, housed in a DO-41 package. It provides a nominal Zener voltage of 13V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +200°C and dissipates up to 1W of power. Key electrical parameters include a test current of 19mA, a maximum reverse leakage current of 5µA at 9.9V, and a Zener impedance of 10Ω.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Wide selection of Zener voltages ranging from 3.3V to 56V
• Standard ±5% Zener voltage tolerance
• RoHS compliant manufacturing

Applications

• Low voltage stabilizers
• Voltage references
• Adapters
• Lighting applications
• On-board DC/DC converters

Procurement Notes

Verify the specific ordering suffix (e.g., R0G or A0G) to confirm the required packing format, such as reel or ammo box quantities. Ensure the component meets RoHS compliance requirements for your assembly process. Confirm that the DO-41 through-hole package aligns with your PCB footprint design. Cross-reference the manufacturer's datasheet version to ensure all thermal and electrical specifications are current before finalizing procurement.

Selection Notes

Select this component when a stable 13V reference is needed in a high-power dissipation environment. The DO-41 package offers robust mechanical stability for through-hole mounting. Consider the ±5% tolerance if tighter voltage regulation is not critical. Evaluate the thermal resistance values to ensure adequate heat dissipation under continuous load conditions without exceeding the maximum junction temperature limits.

Part Context

This part belongs to the 1N4728G–1N4758G series manufactured by Taiwan Semiconductor. The series covers a broad spectrum of Zener voltages from 3.3V to 56V, all sharing the same 1W power rating and hermetically sealed glass construction. The 'G' suffix typically denotes the specific packaging or variant within this standardized JEDEC-compatible lineup.

Replacement Considerations

Compatible substitutes include the 1N4743A from other manufacturers, provided they meet the 13V, 1W, and DO-41 package requirements. Verify that replacement parts maintain the same ±5% tolerance and hermetic sealing characteristics to ensure equivalent performance in sensitive applications.