1N4739A

Overview

The Lumimax Optoelectronic Technology 1N4739A is a single Zener diode with a nominal voltage of 9.1 V and a tolerance of ±5%. It features a maximum power dissipation of 1 W and a peak pulse power rating of 1 W. The device operates within a junction temperature range up to 200°C and a storage temperature range from -65°C to +200°C. Electrical characteristics include a maximum dynamic impedance of 5 Ohms, a reverse leakage current of 10 µA at 7 V, and a forward voltage of 1.2 V at 200 mA. The component utilizes a JEDEC DO-41 glass molded package with plated axial leads.

Feature Summary

• Glass passivated junction for enhanced stability
• Low Zener impedance and low regulation factor
• High temperature soldering guaranteed at 260°C

Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Procurement Notes

Verify the manufacturer designation as Lumimax Optoelectronic Technology against standard industry listings, as this part number is widely produced by other semiconductor vendors. Confirm that the specified DO-41 glass package and electrical parameters match the specific datasheet provided. Ensure compatibility with the intended thermal management requirements given the 170°C/W thermal resistance.

Selection Notes

Select this component when a stable 9.1 V reference is required in through-hole applications. The DO-41 glass package offers robustness for general-purpose electronics. Consider the ±5% tolerance and 5 Ohm impedance for precision requirements. Verify that the 1 W power dissipation rating suits the circuit's thermal environment.

Part Context

This component belongs to the 1N47xxA series of Zener diodes manufactured by Lumimax Optoelectronic Technology. The series covers a wide voltage range from 3.3 V to 75 V, all sharing the same 1 W power rating and DO-41 glass package format. This specific model represents the 9.1 V variant within that standardized lineup.

Replacement Considerations

Standard equivalents include the onsemi 1N4739A, Nexperia 1N4739A,113, and Central Semiconductor 1N4739APBFREE. These parts share identical electrical specifications and mechanical dimensions, allowing for direct substitution in most designs.

FAQ

What is the maximum operating junction temperature?

The maximum operating junction temperature is 200°C.

How is polarity indicated on the component?

Polarity is indicated by a color band on the cathode end of the glass body.