1N4733AT9-E

Overview

The 1N4733AT9-E is a silicon planar Zener diode manufactured by Renesas Electronics Corporation, designed for stabilized power supply applications. It features a nominal Zener voltage of 5.1 V with a maximum dynamic impedance of 7 Ω and a knee impedance of 550 Ω. 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 reverse current of 10 µA and a unidirectional configuration.

Feature Summary

• Utilizes silicon planar technology for reliable voltage regulation
• Provides stable reference voltage through low dynamic impedance characteristics
• Engineered for high thermal stability across extended operating temperatures

Applications

• Stabilized power supply circuits
• Voltage reference generation
• Overvoltage protection stages

Procurement Notes

Verify the specific manufacturer designation, as the 1N4733AT9-E part number is primarily associated with Renesas Electronics Corporation. Confirm package type and electrical tolerances against official datasheets before integration. Ensure compliance with RoHS and REACH standards required for your region. Cross-reference pinouts and thermal ratings to match system requirements accurately.

Selection Notes

Select this component when a precise 5.1 V reference is required with moderate power handling capabilities. The DO-41 package suits through-hole designs needing robust mechanical mounting. Consider the 1 W power rating and thermal resistance for heat dissipation needs. Verify that the 5% voltage tolerance aligns with circuit precision requirements.

Part Context

This component belongs to the standard 1N47xx series of Zener diodes, widely used for basic voltage regulation tasks. The AT9 suffix typically denotes a specific tape-and-reel packaging variant for automated assembly. It serves as a fundamental discrete semiconductor element in analog and mixed-signal electronic systems requiring simple voltage clamping or referencing.

Replacement Considerations

Compatible substitutes include other 5.1 V, 1 W Zener diodes in the DO-41 package from manufacturers like onsemi or Panasonic. Ensure equivalent dynamic impedance and thermal characteristics are maintained. Verify that alternative parts meet the same voltage tolerance and reverse leakage current specifications.