1N4748APE3/TR12

Overview

The Microchip Technology 1N4748APE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP to 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 integration
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 22 V reference
• Power supply protection and clamping applications
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix matches the required packaging configuration, as the TR12 designation indicates tape and reel delivery. Confirm RoHS compliance status via the e3 suffix documentation. Ensure the procurement request aligns with the manufacturer's minimum order quantities and reel specifications. Cross-reference the part number against the latest Microchip Technology datasheet to validate electrical parameters before finalizing orders.

Selection Notes

Select this component when a 22 V Zener voltage with 5% tolerance is required in a 1-watt axial package. The plastic construction offers lower thermal resistance compared to glass-body options. Consider the operating temperature range and power derating curves for high-temperature environments. Verify compatibility with existing PCB layouts designed for DO-41 footprints.

Part Context

This part belongs to the JEDEC registered 1N4728A to 1N4764A series of 1.0-watt Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix denotes plastic encapsulation, while the 'e3' suffix indicates RoHS compliance. The 'TR' suffix specifies tape and reel packaging, facilitating automated assembly processes.

Replacement Considerations

Direct substitutes within the same series include other 1N4748 variants with different tolerances or packaging. Surface mount equivalents such as SMAJ4748A are available but require footprint adaptation. Verify thermal resistance and lead length requirements when substituting.