1N4728ATR

Overview

The onsemi 1N4728ATR is a single-channel general-purpose Zener diode with a nominal voltage of 30 V and a maximum power dissipation of 1 W. It features a 5% tolerance and utilizes the DO-41 through-hole package for mounting. The device is designed for voltage regulation applications within standard electronic circuits.

Feature Summary

• Provides stable voltage regulation at a nominal 30 V level
• Features oxide passivated die construction for reliability
• Utilizes metallurgically bonded double slug type glass construction

Applications

• General purpose voltage regulation in electronic circuits
• Protection against voltage spikes in power supplies
• Reference voltage sources in measurement equipment

Procurement Notes

Verify the specific manufacturer designation, as the 1N4728A series is produced by multiple vendors including Vishay, Motorola, and Panjit. Confirm that the 'ATR' suffix corresponds to the intended tape-and-reel packaging format from onsemi or the specific distributor source. Ensure the component matches the required 30 V specification and DO-41 package dimensions before integration into the design.

Selection Notes

Select this component when a 30 V Zener reference is required in a through-hole assembly. The 1 W power rating allows for moderate current handling compared to lower-power variants. Verify compatibility with the circuit's operating temperature range, which typically extends from -65 °C to +200 °C for this series. Consider the 5% tolerance if precise voltage accuracy is not critical.

Part Context

This component belongs to the widely used 1N47xx series of silicon Zener diodes. These devices are standardized across various manufacturers, offering a complete voltage range from 3.3 V to 100 V. The 1N4728A specifically targets the 30 V segment, providing a reliable solution for low-cost voltage regulation tasks in industrial and consumer electronics.

Replacement Considerations

Compatible substitutes include Vishay 1N4728A, Motorola 1N4728A, and Panjit 1N4728A. These parts share identical electrical characteristics and the DO-41 package, allowing for direct pin-for-pin replacement without circuit modification.