1N4734ATR

Overview

The onsemi 1N4734ATR is a single silicon Zener diode housed in the DO-41 axial leaded glass package. It provides a nominal Zener voltage of 5.6 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range from -65 °C to +200 °C. Key electrical characteristics include a maximum dynamic impedance of 5 Ω and a maximum reverse leakage current of 10 µA.

Feature Summary

• Provides stable voltage regulation through controlled avalanche breakdown in the reverse bias region.
• Features low reverse leakage current for efficient standby operation and minimal power loss.
• Constructed with a hermetically sealed glass encapsulation to ensure environmental durability.

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in sensitive electronic systems
• Clamping applications for transient suppression

Procurement Notes

Verify the specific manufacturer designation, as the 1N4734ATR part number may be associated with various semiconductor producers including Fairchild or onsemi depending on the supply chain source. Confirm that the component meets RoHS compliance requirements if restricted substances are prohibited in the target assembly. Ensure the package type matches the intended PCB footprint before finalizing procurement orders.

Selection Notes

Select this component when a standard 5.6 V reference point is required in through-hole designs. The 1 W power rating allows for robust performance in moderate current scenarios. Verify that the operating environment stays within the specified thermal limits to maintain the ±5% voltage accuracy over the full temperature range.

Part Context

This component belongs to the widely used 1N47xx series of general-purpose Zener diodes. These devices are standardized across multiple manufacturers to provide interchangeable voltage regulation solutions. The 1N4734 variant specifically targets the 5.6 V segment, which is commonly utilized due to its favorable temperature coefficient characteristics compared to lower voltage alternatives.

Replacement Considerations

Equivalent parts include the Vishay 1N4734A-TR and the Micro Commercial Components 1N4734A-TP. Cross-referencing datasheets is necessary to confirm identical pinout configurations and thermal handling capabilities before substitution.