1N4738A-TAP

Overview

The Vishay 1N4738A-TAP is a silicon planar power Zener diode in the DO-41 (DO-204AL) package. It provides an 8.2 V nominal Zener voltage with a ±5% tolerance at a test current of 31 mA. The device supports up to 1300 mW power dissipation and operates within a junction temperature range of -65 °C to +175 °C. Key electrical parameters include a maximum reverse leakage current of 10 µA, dynamic resistance of 4.5 Ω at IZT1, and a surge current rating of 550 mA.

Feature Summary

• Silicon planar construction for high-power stabilization and clipping applications
• Standardized ±5% Zener voltage tolerance
• Glass passivated junction with UL 94 V-0 flammability rating

Applications

• Voltage stabilization circuits
• High-power clipping circuits

Procurement Notes

Verify that the ordering suffix '-TAP' corresponds to the 5000-unit ammpack configuration per the official datasheet. Confirm compliance definitions via the manufacturer's documentation link. Validate all operating parameters against specific application requirements before procurement.

Selection Notes

Select this component for designs requiring an 8.2 V reference or regulation point. Ensure the circuit can accommodate the specified 31 mA test current and 1300 mW thermal dissipation limits. Verify lead soldering conditions do not exceed the 260 °C peak temperature threshold during assembly.

Part Context

This part belongs to the Vishay 1N4728A to 1N4761A series of Zener diodes. The series covers a broad Zener voltage range from 3.3 V to 75 V, sharing common mechanical dimensions and thermal characteristics within the DO-41 package family.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4738A equivalents in the DO-41 package. Verify matching Zener voltage, power dissipation, and tolerance specifications before substitution.

FAQ

What is the dynamic resistance of the 1N4738A?

The typical dynamic resistance (ZZT) at the test current IZT1 is 4.5 Ω.

What is the maximum forward voltage?

The maximum forward voltage is 1.2 V when measured at a forward current of 200 mA.