1N4748AP/TR8

Overview

The Microchip Technology 1N4748AP/TR8 is a single silicon Zener diode designed for voltage regulation in through-hole applications. It features a nominal Zener voltage of 22 V with a tolerance of 5%. The device dissipates up to 1 W of power and operates within a temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 23 Ohms at a test current of 11.5 mA, and a forward voltage of 1.2 V at 200 mA. It is supplied in a DO-204AL (DO-41) axial leaded package on a reel.

Feature Summary

• Provides stable voltage regulation using a single silicon junction structure.
• Engineered for high thermal stability across an extended industrial temperature range.
• Utilizes a plastic encapsulated DO-41 package for robust mechanical mounting.

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• General-purpose voltage regulation tasks

Procurement Notes

Verify the specific suffix configuration against official Microchip documentation to ensure compatibility with required screening levels or environmental standards. Confirm that the TR8 packaging format aligns with automated assembly requirements. Cross-reference the manufacturer part number with current datasheets to validate active status and any recent design changes before finalizing procurement plans.

Selection Notes

Select this component when a 22 V regulation point is required with moderate precision. Ensure the circuit design accommodates the specified 1 W power dissipation limit under worst-case thermal conditions. Verify that the 23 Ohm impedance value meets the dynamic performance needs of the application. Consider the axial lead form factor for manual or standard PCB mounting processes.

Part Context

This part belongs to the widely recognized 1N47 series of 1-watt Zener diodes. These components are standard industry references for low-to-medium voltage regulation. The AP designation typically indicates a plastic encapsulated variant, distinguishing it from glass-body options. This series offers extensive voltage selection covering common regulatory needs.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4748A variants meeting identical 22 V, 1 W, and DO-41 specifications. Verify pinout compatibility and thermal resistance values when cross-referencing with alternative suppliers. Ensure replacement parts maintain the same 5% voltage tolerance and operating temperature range.