1N4747A BK PBFREE

Overview

The Central Semiconductor Corp 1N4747A BK PBFREE is a silicon Zener diode designed for voltage regulation. It features a nominal Zener voltage of 20 V with a 5% tolerance, operating within a range of 19.00 V to 21.00 V. The device dissipates up to 1.0 W at 50°C and operates from -65°C to +200°C. Packaged in the DO-41 axial leaded case, it exhibits a maximum reverse current of 5.0 μA at 18 V and a temperature coefficient between +0.06%/°C and +0.09%/°C.

Feature Summary

• Provides stable voltage regulation using silicon Zener technology
• Features a robust glass body encapsulated in an axial DO-41 package
• Designed for high reliability in industrial and commercial applications

Applications

• Industrial voltage regulation circuits
• Commercial power supply protection
• Computer system voltage reference design

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 mechanical outline. Cross-reference datasheet electrical limits with circuit requirements to validate performance under expected thermal conditions.

Selection Notes

Select this component when a precise 20 V reference is required in a through-hole configuration. Ensure the application environment remains within the specified -65°C to +200°C operational range. Verify that the 1.0 W power dissipation rating accommodates the thermal profile of the target PCB layout.

Part Context

This part belongs to the 1N4728A through 1N4764A series of 1.0 Watt silicon Zener diodes manufactured by Central Semiconductor Corp. The series utilizes a standard DO-41 case style and provides a wide selection of nominal voltages ranging from 3.3 V to 100 V with consistent 5% tolerance across the product line.

Replacement Considerations

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