1N4737A-T50A

Overview

The Fairchild Semiconductor 1N4737A-T50A is a single silicon Zener diode designed for through-hole mounting in the DO-41 axial package. It provides a nominal Zener voltage of 7.5 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum dynamic impedance of 4 Ohms and a reverse leakage current of 10 µA at 5 V.

Feature Summary

• Provides stable voltage regulation using unidirectional silicon Zener technology
• Features hermetically sealed glass construction for environmental protection
• Supports high thermal stability with an extended operating temperature range

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• General-purpose clipping and clamping applications

Procurement Notes

Verify that the specific part number matches the required manufacturer, as this component is also produced by onsemi under identical specifications. Confirm the package style is DO-41 axial and ensure compliance with RoHS standards if applicable to your assembly process. Cross-reference datasheets from different suppliers to confirm exact electrical tolerances and testing conditions before finalizing procurement.

Selection Notes

Select this component when a 7.5 V regulation point is needed with 1 W power handling capability. The DO-41 package suits through-hole designs where higher power dissipation than smaller packages allows. Ensure the circuit design accounts for the specified dynamic impedance and leakage current limits to maintain accuracy under varying load conditions.

Part Context

This component belongs to the standard 1N47xx series of Zener diodes, widely used for basic voltage regulation tasks. The suffix T50A typically indicates tape-and-box packaging for automated assembly. While originally associated with Fairchild Semiconductor, manufacturing rights and production have transitioned to onsemi, which maintains the same electrical profile and physical dimensions for this industry-standard part.

Replacement Considerations

The 1N4737A is a direct substitute manufactured by onsemi. The Nexperia 1N4737A,113 is also listed as a compatible alternative with matching electrical specifications.