1N4740A-TR

Overview

The Vishay 1N4740A-TR is a silicon planar power Zener diode in the 1N4728A to 1N4761A series, housed in a DO-41 (DO-204AL) through-hole package. It features a nominal Zener voltage of 10 V with a standard tolerance of ±5 %. The device operates at a test current of 25 mA and dissipates up to 1300 mW at thermal equilibrium. Key electrical parameters include a maximum reverse leakage current of 10 μA, a dynamic impedance of 7 Ω at the test current, and a forward voltage of 1.2 V max at 200 mA. It supports a junction temperature range from -65 °C to +175 °C.

Feature Summary

• Designed for use in stabilizing and clipping circuits with high power ratings
• Utilizes silicon planar technology for robust performance
• Provides standard Zener voltage tolerance of ±5 %

Applications

• Voltage stabilization
• Clipping circuits

Procurement Notes

Verify that the ordering code suffix matches the required tape and reel configuration. Confirm the specific part number within the 1N4728A to 1N4761A series aligns with the desired Zener voltage. Ensure the component meets RoHS compliance requirements as defined by Vishay's material categorization documentation before finalizing procurement.

Selection Notes

Select this component when a 10 V reference or regulation point is required in through-hole designs. Consider the 1300 mW power dissipation capability and the 7 Ω dynamic impedance for circuit stability. Verify that the operating ambient temperature remains within the specified -65 °C to +175 °C range to ensure reliable operation under all conditions.

Part Context

This component belongs to the Vishay 1N4728A to 1N4761A series of silicon planar power Zener diodes. These devices are manufactured using planar technology and are available in the DO-41 axial leaded package. The series covers a wide range of Zener voltages from 3.3 V to 75 V, providing standardized options for various power regulation and protection applications.

Replacement Considerations

Direct substitutes within the same Vishay series include other 1N47xxA variants with matching voltage ratings. Cross-manufacturer replacements must match the 10 V nominal voltage, 1 W+ power rating, and DO-41 package dimensions. Verify equivalent dynamic impedance and leakage current specifications to maintain circuit performance.