1N4739A BK PBFREE

Overview

The Central Semiconductor Corp 1N4739A BK PBFREE is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 9.1 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +200°C. Packaged in the DO-41 axial leaded format, it exhibits a maximum dynamic impedance of 5 Ω at the test current and maintains low reverse leakage characteristics.

Feature Summary

• Provides stable voltage regulation via a single Zener junction structure
• Capable of handling high thermal loads with an extended operating temperature range up to 200°C
• Constructed using silicon technology for reliable performance in discrete semiconductor circuits

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• General-purpose voltage regulation in power supplies

Procurement Notes

Verify that the specific suffix 'BK' corresponds to the desired packaging configuration, as datasheets may list standard bulk or tape options. Confirm RoHS compliance status directly with the manufacturer documentation, as some listings indicate non-compliance while others suggest compliance. Ensure the DO-41 package dimensions match the target PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when a 9.1 V regulation point is required with significant power handling capabilities. The DO-41 through-hole package facilitates manual assembly and robust mechanical mounting. Consider the ±5% voltage tolerance and 5 Ω dynamic impedance specifications to ensure compatibility with the circuit's precision requirements and load conditions.

Part Context

This part belongs to the 1N4739 series of voltage regulator diodes manufactured by Central Semiconductor Corp. The series utilizes standard DO-41 axial packages for through-hole implementation. The device functions as a discrete semiconductor component intended for integration into larger electronic assemblies where stable DC voltage levels are critical for proper operation.

Replacement Considerations

Equivalent parts include the CLL4739A TR PBFREE, which offers identical electrical specifications but utilizes a MELF surface-mount package instead of the axial DO-41 form factor. Other generic 1N4739 variants from different manufacturers may serve as functional substitutes if package constraints allow.