1N4739A TR PBFREE

Overview

The Central Semiconductor Corp 1N4739A TR PBFREE is a silicon Zener diode designed for voltage regulation in industrial and commercial applications. It features a nominal Zener voltage of 9.1 V with a ±5% tolerance, housed in the DO-41 axial package. The device supports a maximum power dissipation of 1.0 W at 50°C and operates within a temperature range of -65°C to +200°C. Electrical characteristics include a maximum Zener impedance of 5.0 Ω at the test current of 28 mA, a maximum reverse leakage current of 10 μA at 7 V, and a forward voltage drop of 1.2 V maximum at 200 mA.

Feature Summary

• High reliability voltage regulation suitable for industrial and computer applications
• Lead-free plating compliant with RoHS3 specifications
• Wide operating and storage temperature capability up to 200°C

Applications

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

Procurement Notes

Verify that the ordering suffix 'TR' corresponds to tape-and-reel packaging as indicated by distributor listings. Confirm the 'PBFREE' designation aligns with lead-free manufacturing requirements. Ensure the component matches the DO-41 through-hole package form factor required for the specific circuit board layout. Cross-reference the manufacturer part number against official datasheets to confirm electrical parameters.

Selection Notes

Select this component when a 9.1 V regulated voltage is required with a 1 W power handling capacity. The DO-41 package is appropriate for through-hole mounting techniques. Consider the positive temperature coefficient (+0.035 to +0.075 %/°C) for thermal stability in the design. Verify that the 5.0 Ω dynamic impedance meets the noise and regulation requirements of the target application.

Part Context

This part belongs to the 1N4728A through 1N4764A series of 1-watt silicon Zener diodes manufactured by Central Semiconductor Corp. The series covers a voltage range from 3.3 V to 100 V with consistent 5% tolerance across all variants. The 1N4739A specifically addresses the 9.1 V segment of this standardized product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the available documentation.