1N4747APE3/TR8

Overview

The Microchip Technology 1N4747APE3/TR8 is a silicon 1.0-watt Zener diode housed in a plastic DO-41 (DO-204AL) axial-lead package. It provides voltage regulation with a nominal Zener voltage of 20 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C, featuring a maximum reverse current of 100 nA at the test voltage and a dynamic impedance of 22 Ohms at the specified test current of 12.5 mA.

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 20 V reference
• Power supply protection against overvoltage conditions
• Clamping applications in electronic signal processing

Procurement Notes

Verify that the ordering suffix 'e3' confirms RoHS compliance and annealed matte-Tin plating as specified by the manufacturer. Confirm the 'TR' suffix indicates tape-and-reel packaging compliant with EIA-296 standards. Ensure the component matches the specific JEDEC registered type number for the required electrical characteristics and mechanical dimensions.

Selection Notes

Select this component when a 20 V regulation point is required with a 5% tolerance. Consider the 1.0 W power dissipation capability and the thermal resistance values for proper heat management. Verify compatibility with the DO-41 package dimensions and lead spacing for the target printed circuit board layout.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of 1.0-watt plastic encapsulated Zener diodes manufactured by Microsemi (now Microchip). The series covers a wide voltage selection from 3.3 to 100 volts. The 'P' suffix designates the plastic construction, which offers lower thermal resistance compared to glass-body options.

Replacement Considerations

Compatible substitutes include other 1N4747A variants with matching 20 V ratings and 5% tolerances. Equivalent parts must maintain the 1.0 W power dissipation rating and DO-41 package form factor. Verify that any replacement meets the same thermal and electrical specifications.