1N4757APE3/TR8

Overview

The Microchip Technology 1N4757APE3/TR8 is a silicon unidirectional Zener diode with a nominal voltage of 51V and a 5% tolerance. It features a maximum power dissipation of 1.0 watt at 25°C, housed in a plastic DO-41 (DO-204AL) package. The device exhibits a maximum dynamic impedance of 95Ω at a test current of 5.0mA and a maximum reverse current of 5µA at 38.8V. It includes an 'e3' suffix for RoHS compliance and a 'TR' suffix indicating tape and reel packaging.

Feature Summary

• Provides voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals suitable for standard PCB assembly
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards

Applications

• Voltage regulation circuits requiring stable reference voltages
• Power supply protection against overvoltage conditions
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify the specific ordering suffixes to confirm package type and compliance status. The 'P' suffix indicates plastic construction, while 'e3' denotes RoHS compliance. Confirm the 'TR' suffix matches the required tape and reel specifications for automated assembly processes. Ensure the manufacturer source aligns with Microchip Technology or authorized distributors to guarantee component authenticity and traceability.

Selection Notes

Select this component when a 51V Zener voltage with 5% tolerance is required in a plastic axial-lead package. The 1W power rating supports moderate current applications. Consider the thermal resistance characteristics for heat dissipation requirements. Verify that the 95Ω dynamic impedance meets the circuit's stability needs compared to lower impedance alternatives available in the series.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of 1.0-watt Zener diodes manufactured by Microsemi, now part of Microchip Technology. The series offers extensive voltage selection from 3.3V to 100V. The plastic encapsulated variants provide lower thermal resistance compared to glass-body options and are moisture classified as Level 1, eliminating the need for dry pack storage.

Replacement Considerations

Equivalent parts within the same series include 1N4757A and 1N4757P. Cross-reference datasheets for identical electrical parameters such as voltage, power rating, and impedance before substitution.