1N4750ATR

Overview

The Fairchild Semiconductor 1N4750ATR is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 27 V with a tolerance of 5%. The device is rated for a power dissipation of 1 W and operates within a temperature range of -65 °C to +200 °C. It utilizes a DO-41 axial leaded package suitable for through-hole mounting. Key electrical characteristics include a maximum reverse leakage current of 5 µA, a Zener impedance of 35 Ohms, and a test current of 9.5 mA.

Feature Summary

• Provides stable voltage regulation at a nominal 27 V level
• Capable of handling 1 W power dissipation in a rugged glass passivated junction
• Engineered for high-temperature operation up to 200 °C
• Utilizes a standard DO-41 axial package for reliable through-hole integration

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in electronic systems
• Power supply regulation modules
• Clamping applications in signal processing paths

Procurement Notes

Verify the manufacturer designation on the component marking, as this part number is historically associated with Fairchild Semiconductor but may be produced by other entities under license or acquisition. Confirm the specific suffix 'ATR' indicates tape and reel packaging if required for automated assembly. Ensure compliance with RoHS directives if applicable to the target market. Cross-reference datasheets from current authorized distributors to confirm active status and parameter consistency.

Selection Notes

Select this component when a 27 V regulation point is required with moderate power handling capabilities. The DO-41 package is appropriate for designs prioritizing mechanical robustness over miniaturization. Consider the thermal resistance and ambient operating conditions to ensure the 1 W rating is not exceeded. Verify that the 5% voltage tolerance meets the circuit precision requirements. Compare against alternative manufacturers offering identical electrical specifications for supply chain diversification.

Part Context

The 1N4750A series belongs to a widely used family of glass-passivated junction Zener diodes. These components are standardized across multiple semiconductor manufacturers, ensuring broad compatibility. The 'TR' suffix typically denotes tape and reel packaging for surface mount or automated through-hole insertion processes. This series is commonly found in industrial, automotive, and consumer electronics due to its reliability and established performance history.

Replacement Considerations

Equivalent parts include the ON Semiconductor 1N4750ATR and Rectron 1N4750A-B. Verify pinout compatibility and package dimensions (DO-41) before substitution. Ensure the replacement device meets or exceeds the 1 W power rating and 27 V Zener voltage specification. Check for any differences in thermal characteristics or leakage current limits.