1N4748ATR

Overview

The onsemi 1N4748ATR is a single-channel general-purpose Zener voltage regulator diode designed for through-hole mounting in the DO-41 package. It features a nominal Zener voltage of 22 V with a tolerance of ±5% and a maximum power dissipation of 1 W. The device operates within a temperature range of -65°C to 200°C, ensuring reliability under varying thermal conditions. Key electrical characteristics include a test current of 19 mA, a maximum Zener impedance of 10 Ω, and a maximum reverse leakage current of 5 μA.

Feature Summary

• Provides stable voltage regulation at a nominal 22 V reference level
• Engineered for high-temperature operation up to 200°C
• Features low reverse leakage current for efficient standby performance

Applications

• Voltage reference circuits requiring precise 22 V levels
• Overvoltage protection stages in power supply designs
• General-purpose clamping applications in electronic systems

Procurement Notes

Verify that the specific part number matches the required DO-41 axial leaded package configuration. Confirm the manufacturer designation as onsemi to ensure component authenticity and traceability. Check datasheet specifications for operating temperature limits and power derating curves relevant to your thermal management strategy before finalizing procurement decisions.

Selection Notes

Select this component when a robust 1 W Zener diode with a 22 V breakdown voltage is required for through-hole assembly. The DO-41 package offers mechanical stability suitable for standard PCB layouts. Ensure the application environment stays within the specified -65°C to 200°C range to maintain the guaranteed ±5% voltage tolerance and impedance characteristics defined in the official specifications.

Part Context

This component belongs to the 1N47 series of silicon Zener diodes manufactured by onsemi. The 'ATR' suffix typically indicates tape-and-reel packaging for automated assembly processes. These devices are widely used in industrial and commercial electronics where reliable voltage regulation and overvoltage protection are critical system requirements.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4748A variants in the DO-41 package. Verify that replacement parts meet the same 22 V nominal voltage, 1 W power rating, and ±5% tolerance specifications to ensure circuit compatibility without redesign.