1N4748PE3/TR8

Overview

The Microchip Technology 1N4748PE3/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial lead package. It provides voltage regulation with a nominal Zener voltage of 22 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum power dissipation of 1.0 watts at 25°C. Electrical characteristics include a test current of 11.5 mA, a maximum dynamic impedance of 23 Ohms, and a maximum reverse current of 5 µA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Procurement Notes

Verify that the ordering suffix TR indicates tape and reel packaging as specified by EIA-296 standards. Confirm RoHS compliance via the e3 suffix designation. Ensure the component meets the required JEDEC registration type number specifications for your design. Cross-reference datasheet electrical limits against your specific circuit conditions before finalizing procurement.

Selection Notes

Select this component when a 22 V regulation point with 5% tolerance is required in a 1-watt power class. The plastic construction offers lower thermal resistance compared to glass-body options. Verify that the operating environment stays within the -65°C to +150°C range. Consider the 23 Ohm dynamic impedance for noise-sensitive applications where tighter impedance might be necessary.

Part Context

This part belongs to the widely used 1N47xx series of silicon Zener diodes manufactured by Microsemi's Scottsdale Division, now part of Microchip Technology. The series covers voltages from 3.3 V to 100 V. The 'P' suffix denotes plastic encapsulation, while 'e3' confirms RoHS compliance. These devices are JEDEC registered and offer extensive voltage selection for general-purpose regulation tasks.

Replacement Considerations

Compatible substitutes include other 1N4748 variants such as 1N4748A or 1N4748AP, provided they match the 22 V rating and 1 W power dissipation. Ensure any replacement maintains the same DO-41 package dimensions and electrical tolerances. Verify that alternative manufacturers meet the same JEDEC registration standards.