1N4738A-TP

Overview

The MCC 1N4738A-TP is a silicon planar Zener diode housed in a hermetic DO-41 glass package. It provides an 8.2V nominal Zener voltage with a 5% tolerance and dissipates up to 1.0W of power at 50°C ambient temperature. The device features a maximum reverse leakage current of 10µA at 6V, a dynamic impedance of 4.5 Ohms at the test current of 31mA, and a forward voltage drop not exceeding 1.2V at 200mA. It operates within a temperature range of -65°C to +200°C.

Feature Summary

• Hermetic glass encapsulation for environmental protection
• Silicon planar construction for stable regulation
• Lead-free finish compliant with RoHS directives

Applications

• Voltage reference circuits
• Overvoltage protection stages
• General-purpose DC power supply regulation

Procurement Notes

Verify authenticity by purchasing exclusively from Micro Commercial Components or authorized distributors to avoid counterfeit components. Confirm that the ordering suffix 'TP' indicates lead-free compliance. Ensure the component meets specific thermal derating requirements if operating above 50°C ambient temperature.

Selection Notes

Select this component when a robust, hermetically sealed Zener diode is required for high-reliability applications. The DO-41 package supports through-hole mounting, while the 1.0W rating allows for effective heat dissipation without external heatsinks under standard conditions.

Part Context

This part belongs to the 1N4728A through 1N4761A series of 1.0 Watt Zener diodes manufactured by Micro Commercial Components. The series covers a wide voltage range from 3.3V to 75V, utilizing a standardized JEDEC DO-41 glass package for consistent mechanical integration across various electronic designs.

Replacement Considerations

Cross-reference with other manufacturers offering the 1N4738A specification in a DO-41 package. Verify that substitute parts maintain the same 5% voltage tolerance, 1.0W power rating, and hermetic sealing characteristics to ensure circuit compatibility.