1N4729ATR

Overview

The onsemi 1N4729ATR is a silicon unidirectional Zener diode housed in a DO-41 glass case. It provides a nominal voltage regulation of 3.6 V with a tolerance range of 3.42 V to 3.78 V at a test current of 69 mA. The device supports a power dissipation of 1.0 W and operates within a temperature range of -65 °C to +200 °C. Key electrical characteristics include a maximum Zener impedance of 400 Ω, a leakage current of 1 µA, and a non-repetitive peak reverse current capability of 1260 mA.

Feature Summary

• Provides stable voltage regulation for stabilizing and clipping circuits
• Features hermetically sealed glass construction for high reliability
• Supports through-hole mounting via axial leads

Applications

• Voltage stabilization circuits
• Signal clipping applications
• General-purpose voltage reference

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and compliance status. Confirm that the component meets all required environmental and safety standards for the intended application before procurement.

Selection Notes

Select this component based on its 3.6 V nominal regulation requirement and 1.0 W power handling capacity. Ensure the operating environment stays within the specified temperature limits and that the low leakage current meets circuit sensitivity requirements.

Part Context

This part belongs to the 1N4728A–1N4758A series of 1-watt Zener diodes manufactured by onsemi. These devices are designed for general-purpose voltage regulation tasks requiring reliable performance in standard electronic assemblies.

Replacement Considerations

Cross-reference with other manufacturers' 1N4729A equivalents. Verify pinout compatibility and ensure replacement parts meet identical electrical specifications for voltage, power, and impedance.