1N4747CE3/TR13

Overview

The Microchip Technology 1N4747CE3/TR13 is a silicon 1-watt Zener diode in the 1N4728A through 1N4764A series. It provides voltage regulation with a nominal Zener voltage of 20 V and a tight tolerance of +/- 2%, indicated by the 'C' suffix. The device operates within a temperature range of -65°C to +150°C and features a plastic DO-41 (DO-204AL) axial lead package. Electrical characteristics include a maximum dynamic impedance of 22 Ohms at a test current of 12.5 mA, a maximum reverse current of 45 µA at 15 V, and a maximum regulator current of 225 mA.

Feature Summary

• Provides precise voltage regulation with a 2% tolerance on nominal Zener voltage
• Features flexible axial-lead mounting terminals for standard PCB integration
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Operates reliably over a broad temperature range from -65°C to +150°C

Applications

• Voltage reference circuits requiring stable DC levels
• Power supply regulation and protection stages
• General-purpose voltage clamping applications

Procurement Notes

Verify that the ordering suffix matches the required specifications: 'e3' indicates RoHS compliance, 'C' denotes the 2% voltage tolerance, and 'TR' specifies tape and reel packaging. Confirm the manufacturer origin, as this part originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the procurement documentation aligns with the JEDEC registered type number 1N4747A.

Selection Notes

Select this component when a 20 V regulation point with high precision is required. The 2% tolerance makes it suitable for applications where tighter control than the standard 5% or 10% variants offers. Consider the 1 W power dissipation rating and thermal resistance values when designing heat management strategies for continuous operation.

Part Context

This component belongs to the popular 1N4728A through 1N4764A series of 1.0 watt Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The specific device utilizes a plastic encapsulated body, which provides lower thermal resistance compared to glass-body options. It is a JEDEC registered device available in various screening levels and packaging configurations.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4747A devices with equivalent 20 V, 1 W, and 2% tolerance ratings. Surface mount equivalents such as SMAJ4747A are available for designs requiring footprint changes. Verify that any replacement maintains the same axial lead spacing and thermal characteristics.