1N4743A

Overview

The Lumimax Optoelectronic Technology 1N4743A is a single silicon Zener diode housed in a JEDEC DO-41 glass package. It provides a nominal Zener voltage of 13V with a tolerance of ±5%. The device supports a maximum power dissipation of 1W and operates within a junction temperature range up to 200°C. Key electrical characteristics include a maximum Zener impedance of 10 Ohms, a reverse leakage current of 5 µA at 9.9V, and a forward voltage of 1.2V at 200mA.

Feature Summary

• Glass passivated junction for enhanced stability
• Low Zener impedance and regulation factor
• High temperature soldering capability

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 brand is not widely recognized for discrete semiconductor components. Confirm that the specific part number matches the provided datasheet specifications exactly. Ensure compliance with RoHS requirements if applicable to your assembly process. Check for any specific handling instructions related to the glass package construction.

Selection Notes

Select this component when a 13V reference is required in a through-hole DO-41 form factor. Consider the 1W power rating and thermal resistance of 170°C/W for heat management. The low leakage current makes it suitable for precision applications where minimal current draw is critical. Verify that the ±5% tolerance meets the circuit design requirements.

Part Context

This component belongs to the 1N47xxA series of Zener diodes, which covers a wide voltage range from 3.3V to 75V. The series shares common mechanical features including the DO-41 glass package and axial leads. The 'A' suffix consistently denotes a ±5% voltage tolerance across the entire product line.

Replacement Considerations

Standard equivalents include the 1N4743A from manufacturers such as onsemi, Nexperia, PANJIT, and Rectron. These parts share identical electrical ratings and the DO-41 package, ensuring pin compatibility and functional interchangeability in most designs.

FAQ

What is the maximum operating junction temperature?

The maximum junction temperature (Tj) is 200°C.

How is the cathode polarity identified?

Polarity is indicated by a color band on the glass body, which marks the cathode end.

Is high-temperature soldering supported?

Yes, the device guarantees high-temperature soldering performance at 260°C for 10 seconds with a 9.5mm lead length under 5 lbs tension.