1N4733A BK TIN/LEAD

Overview

The Central Semiconductor Corp 1N4733A BK TIN/LEAD is a silicon planar power Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.1 V with a tight tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within a temperature range from -65 °C to +200 °C junction temperature. Packaged in the DO-41 axial leaded format, it exhibits a maximum reverse leakage current of 10 µA at 1 V and a dynamic impedance of 7 Ω. The component utilizes tin/lead solderable terminals and includes a black band marking to identify the cathode end.

Feature Summary

• Provides stable voltage regulation through controlled avalanche breakdown characteristics
• Features low inductance construction suitable for high-frequency switching environments
• Utilizes isolated plastic case material with UL flammability classification rating 94V-O

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• Clamping applications for transient suppression

Procurement Notes

Verify that the specific ordering suffix matches the required terminal finish and marking configuration. Confirm compliance requirements such as RoHS status against project specifications, as leaded variants may differ from standard environmental directives. Ensure the package type aligns with existing PCB footprint designs before finalizing procurement orders.

Selection Notes

Select this component when a 5.1 V regulation point is required with strict tolerance limits. Consider the 1 W power rating for thermal management capabilities in enclosed spaces. Verify that the DO-41 package dimensions fit the available board space and that the operating temperature range meets the environmental conditions of the target application.

Part Context

This part belongs to the industry-standard 1N47xx series of power Zener diodes manufactured by Central Semiconductor. The series covers a wide voltage range from 3.3 V to 100 V, sharing common mechanical and electrical characteristics. The 'BK' designation typically indicates the presence of a cathode band marking for polarity identification during assembly.

Replacement Considerations

Cross-reference with other manufacturers offering the 1N4733A specification. Verify that substitute parts maintain the same 5.1 V nominal voltage, ±5% tolerance, and 1 W power dissipation rating. Ensure the replacement package matches the DO-41 form factor and terminal compatibility.