1N4731A-T

Overview

The Vishay 1N4731A-T is a silicon planar power Zener diode in the DO-41 (DO-204AL) through-hole package. It provides a nominal Zener voltage of 4.3 V with a standard tolerance of ±5%. The device operates at a test current of 58 mA and features a maximum dynamic resistance of 9 Ω. It dissipates up to 1.3 W under thermal equilibrium conditions, with a peak surge capability of 10 ms pulses reaching 1070 mA. The component supports an operating temperature range from -65 °C to +175 °C.

Feature Summary

• Designed for high-power voltage stabilization and clipping applications
• Utilizes silicon planar technology for robust performance
• Provides hermetic-sealed glass encapsulation in a DO-41 package

Applications

• Voltage stabilization circuits
• Signal clipping circuits
• Power supply regulation

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging format. Confirm RoHS compliance status and material categorization details directly from the manufacturer's datasheet before procurement. Ensure lead length requirements align with the specified 4 mm distance for accurate thermal dissipation ratings during installation.

Selection Notes

Select this component when a 4.3 V reference point is required in through-hole designs. Evaluate the 1.3 W power dissipation capacity against ambient temperature derating curves. Consider the 9 Ω dynamic impedance for stability requirements in low-current regulator configurations.

Part Context

This part belongs to the 1N4728A through 1N4761A series of Zener diodes manufactured by Vishay Semiconductors. The series covers a wide voltage range from 3.3 V to 75 V, offering standardized tolerances and consistent electrical characteristics across multiple manufacturers utilizing the JEDEC registration.

Replacement Considerations

Direct substitutes include Nexperia 1N4731A and Rectron 1N4731A-B. Verify pinout compatibility and ensure equivalent power dissipation ratings are maintained in the target application circuit.