1N4738A-TR

Overview

The Vishay 1N4738A-TR is a silicon planar power Zener diode designed for voltage stabilization and clipping applications. It features an 8.2 V nominal Zener voltage with a ±5% tolerance, tested at 31 mA. The device dissipates up to 1.3 W of power in the DO-41 axial leaded package. Key electrical characteristics include a maximum dynamic resistance of 4.5 Ω and a reverse leakage current of 10 µA at 6 V. It operates within a junction temperature range of -65 °C to +175 °C.

Feature Summary

• Silicon planar construction optimized for high-power stabilizing and clipping circuits
• Standardized Zener voltage tolerance of ±5% for consistent regulation performance
• Glass passivated junction ensuring reliability under high-temperature soldering conditions

Applications

• Voltage stabilization
• Clipping circuits

Procurement Notes

Verify that the ordering code suffix matches the required packaging format, such as TR for taped units on a 14-inch reel or TAP for ammopack configurations. Confirm compliance with material categorization standards by referencing the official Vishay documentation link provided in the datasheet. Ensure the component meets specific environmental requirements before final procurement.

Selection Notes

Select this component when a single circuit configuration with a nominal 8.2 V breakdown is required. The DO-41 package supports through-hole mounting and provides sufficient thermal dissipation for continuous operation. Verify that the surge current rating aligns with the expected transient loads in the target application environment.

Part Context

This part belongs to the 1N4728A to 1N4761A series of Zener diodes manufactured by Vishay Semiconductors. The series covers a broad Zener voltage range from 3.3 V to 75 V, utilizing standardized test currents and dynamic resistance specifications across the product line.

Replacement Considerations

Cross-reference other manufacturers offering 1N4738A equivalents in the DO-41 package. Ensure replacement parts maintain identical Zener voltage tolerances and power dissipation ratings to preserve circuit stability.