1N4757PE3/TR8

Overview

The Microchip Technology 1N4757PE3/TR8 is a silicon 1.0-watt Zener diode housed in a DO-41 (DO-204AL) plastic axial-lead package. It provides voltage regulation with a nominal Zener voltage of 51 V and a standard tolerance of ±10%. The device features a maximum dynamic impedance of 95 Ω at the test current of 5.0 mA and a maximum reverse leakage current of 5 µA at 38.8 V. It operates within a temperature range of -65°C to +150°C, has a thermal resistance of 45 °C/W junction-to-lead, and complies with RoHS standards.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Procurement Notes

Verify that the ordering suffix TR8 corresponds to tape and reel packaging as specified by EIA-296 standards. Confirm the presence of the e3 suffix indicates RoHS compliance with annealed matte-tin plating. Ensure the component matches the JEDEC registered 1N4757A type number specifications for electrical characteristics.

Selection Notes

Select this component when a 51 V regulated voltage is required in a high-power 1 W application. The plastic construction offers lower thermal resistance compared to glass-body options. Verify that the ±10% tolerance meets circuit requirements, as tighter tolerances require different suffixes such as A, C, or D.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of silicon Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers a voltage selection from 3.3 to 100 volts. The P suffix designates the plastic encapsulated version, while the e3 suffix denotes RoHS compliant devices available from the manufacturer.

Replacement Considerations

Surface mount equivalents are available as SMAJ4757A and MLL4757A. Other variants within the same series include 1N4756A and 1N4758A for adjacent voltage levels.