1N4733ATR

Overview

The onsemi 1N4733ATR is a single silicon planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.1 V with a tolerance of ±5%. The device operates in the through-hole DO-41 package and dissipates up to 1 W of power. Key electrical characteristics include a maximum reverse leakage current of 10 µA, a Zener impedance of 7 Ω at a test current of 49 mA, and a forward voltage of 1.2 V. It supports an operating temperature range from -65 °C to +200 °C.

Feature Summary

• Provides stable voltage regulation using a single silicon planar structure.
• Features low reverse leakage current for efficient standby operation.
• Utilizes a robust DO-41 axial leaded package for reliable through-hole mounting.

Applications

• General-purpose voltage reference circuits
• Overvoltage protection stages
• Power supply output regulation

Procurement Notes

Verify the specific suffix 'ATR' against the manufacturer's official documentation to confirm reel packaging specifications and tape-and-reel dimensions. Ensure the selected variant matches the required RoHS compliance status and lead-free plating requirements for your assembly process. Cross-reference the part number with the latest datasheet revision to confirm any updates to mechanical drawings or testing standards.

Selection Notes

Select this component when a standard 5.1 V reference is required in a through-hole configuration. Compare the 7 Ω dynamic impedance against circuit sensitivity requirements. Verify that the 1 W power dissipation rating accommodates the expected thermal environment without exceeding the maximum junction temperature limits defined in the absolute maximum ratings.

Part Context

This component belongs to the industry-standard 1N47xx series of power Zener diodes. The 'A' suffix typically denotes a tighter ±5% voltage tolerance compared to the base 1N4733 model. The 'TR' suffix indicates the unit is supplied in a tape-and-reel format suitable for automated surface mount or through-hole insertion machinery.

Replacement Considerations

Compatible substitutes include Vishay 1N4733A-TR and Microchip 1N4733AUR/TR. Verify pinout compatibility and ensure the alternative package maintains the same thermal resistance characteristics for direct board replacement.