1N4747AE3/TR13

Overview

The Microchip Technology 1N4747AE3/TR13 is a Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 20 V with a tolerance of ±5%. The device operates in the DO-41 axial package and dissipates up to 1 W of power. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 22 Ohms, and a test current of 12.5 mA. It supports a forward current of 200 mA and maintains an operating temperature range from -65°C to +175°C.

Feature Summary

• Provides stable voltage regulation at a nominal 20 V level
• Capable of handling 1 W power dissipation in an axial leaded package
• Operates reliably across an extended industrial temperature range

Applications

• General-purpose voltage reference circuits
• Over-voltage protection stages
• Biasing networks in analog signal processing

Procurement Notes

Verify the specific suffix TR13 indicates reel packaging when sourcing. Confirm RoHS compliance status through official Microchip documentation prior to integration. Ensure the DO-41 footprint matches the target PCB layout requirements. Check for any recent product change notifications that may affect pinout or material composition.

Selection Notes

Select this component where a precise 20 V reference is required with moderate power handling capabilities. The axial DO-41 package suits through-hole mounting strategies. Consider the 22 Ohm impedance value for dynamic regulation needs. Evaluate thermal management requirements given the 1 W dissipation rating in enclosed environments.

Part Context

This part belongs to the standard 1N47xx series of Zener diodes manufactured by Microchip Technology. It shares functional similarities with other axial Zener devices but is distinguished by its specific 20 V rating and 1 W power class. The series is widely used in legacy and modern electronic designs requiring reliable voltage clamping.

Replacement Considerations

Cross-reference with other manufacturers offering 20 V, 1 W Zener diodes in the DO-41 package. Verify that substitute parts meet the same 22 Ohm impedance and 100 nA leakage specifications. Ensure thermal ratings and voltage tolerances align with the original design constraints.