1N4732A BK PBFREE

Overview

The 1N4732A BK PBFREE is a silicon Zener diode manufactured by Central Semiconductor Corp. It features a nominal Zener voltage of 5.1V and a power dissipation rating of 1W. The component utilizes the DO-41 axial leaded package for through-hole mounting. It operates within a temperature range of -65°C to +200°C junction temperature. Key electrical characteristics include a maximum reverse leakage current of 10µA and a dynamic impedance of 7Ω.

Feature Summary

• Provides stable voltage regulation via Zener breakdown mechanism in the reverse bias region.
• Capable of dissipating 1W of power, suitable for moderate current protection applications.
• Constructed with silicon material for reliable performance across wide thermal ranges.

Applications

• Voltage reference circuits requiring stable DC levels.
• Overvoltage protection for sensitive electronic components.
• Clamping applications in signal processing paths.

Procurement Notes

Verify the specific suffix 'BK' against the manufacturer's official documentation to confirm if it denotes a specific tape-and-reel or bulk packaging variant distinct from standard DO-41 distribution. Ensure the RoHS compliance status matches project requirements, as older Central Semiconductor part numbers may have varying environmental declarations depending on the production batch date code.

Selection Notes

Select this component when a 5.1V Zener voltage with 1W power handling is required in an axial package. Compare the 7Ω dynamic impedance against circuit sensitivity requirements. Verify that the TO-92 or DO-41 form factor fits the PCB layout constraints. Consider thermal derating factors if operating near the maximum junction temperature limit of 200°C.

Part Context

This part belongs to the 1N47 series of Zener diodes produced by Central Semiconductor. The series offers various voltage ratings in the DO-41 package. The 'PBFREE' designation indicates lead-free construction compliant with environmental directives. The 'BK' suffix likely refers to a specific packaging configuration provided by the distributor or manufacturer.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4732A equivalents in the DO-41 package. Verify pinout compatibility and ensure the replacement part meets or exceeds the 1W power dissipation and 5.1V Zener voltage specifications. Check for identical thermal resistance values to maintain system reliability.