1N4738A BK PBFREE

Overview

The Central Semiconductor Corp 1N4738A BK PBFREE is a silicon Zener diode designed for voltage regulation in industrial and commercial applications. It features a nominal Zener voltage of 8.2 V with a 5% tolerance, housed in a DO-41 axial package. The device dissipates 1.0 W at 50°C and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse current of 10 µA at 5.5 V, a maximum DC test current of 6.0 mA, and a temperature coefficient ranging from +0.03% to +0.07% per °C.

Feature Summary

• Provides stable voltage regulation using a glass passivated junction
• Features low Zener impedance for improved performance
• Guarantees high temperature soldering capability

Applications

• Industrial equipment voltage regulation
• Commercial circuit protection
• Entertainment system power supplies
• Computer application voltage references

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation before procurement. Confirm RoHS compliance status and ensure the component matches the required DO-41 package dimensions. Cross-reference datasheet parameters such as Zener impedance and reverse leakage current to validate suitability for the target circuit design requirements.

Selection Notes

Select this component when a precise 8.2 V reference is required in an axial through-hole configuration. Consider the thermal resistance and operating temperature limits during circuit layout. Ensure the maximum DC current rating aligns with the expected load conditions to maintain stable regulation without exceeding power dissipation limits.

Part Context

This part belongs to the 1N4728A through 1N4764A series of 1-watt silicon Zener diodes manufactured by Central Semiconductor. The series offers a wide voltage range from 3.3 V to 100 V with consistent 5% tolerance across all variants. These components are widely utilized in standard electronic designs requiring reliable voltage clamping or reference generation.

Replacement Considerations

No official replacement part numbers are documented for this specific model in the provided datasheet.