1N4749A_S00Z

Overview

The onsemi 1N4749A is a silicon unidirectional voltage regulator diode housed in a DO-41 glass package. It provides a nominal Zener voltage of 24 V with a maximum tolerance of ±5%. The device dissipates up to 1.0 W at lead temperatures below 50°C, requiring a derating of 6.67 mW/°C above this threshold. Electrical characteristics include a test current of 10.5 mA, a maximum dynamic impedance of 25 Ω, and a leakage current of 5 μA at 18.2 V. The operating and storage temperature range spans from -65°C to +200°C.

Feature Summary

• Hermetically sealed small glass package construction
• Low voltage regulation capability within the series range
• High peak reverse power dissipation capacity

Applications

• Low voltage stabilizers

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm compliance requirements and marking variations. Confirm that the component meets RoHS standards if required by the design specifications. Ensure the selected packaging format aligns with automated assembly processes or manual placement needs. Cross-reference datasheet revision numbers to validate electrical parameters for the production batch.

Selection Notes

Select this component for circuits requiring precise low-voltage reference points or overvoltage protection. Evaluate thermal management strategies to maintain junction temperatures within the specified limits during continuous operation. Consider the package's axial lead configuration for through-hole mounting applications. Verify compatibility with the circuit's expected current levels and impedance requirements.

Part Context

This part belongs to the 1N4728A through 1N4758A series of Zener diodes manufactured by onsemi. The series offers a wide range of nominal working voltages from 3.3 V to 56 V. These devices are designed for general-purpose voltage regulation tasks in electronic circuits.

Replacement Considerations

Compatible substitutes include Vishay 1N4749A and Taiwan Semiconductor 1N4749A. Verify pinout compatibility and ensure equivalent electrical ratings before substitution.