1N5378E3/TR8

Overview

The Microsemi Corporation 1N5378E3/TR8 is a silicon unidirectional Zener diode with a nominal voltage of 100V and a maximum power dissipation of 5W. It features a plastic T-18 axial lead package and complies with RoHS standards. The device belongs to the JEDEC registered 1N5333B through 1N5388B series, offering voltage regulation across a broad operating current and temperature range.

Feature Summary

• Provides stable voltage regulation over a wide operating current and temperature range
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Features flexible axial-lead mounting terminals for versatile integration
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation in power supply circuits
• Protection against voltage spikes and transients
• Reference voltage generation in electronic systems

Procurement Notes

Verify that the component matches the specified 1N5378E3/TR8 part number, ensuring the presence of the e3 suffix for RoHS compliance and TR suffix for tape and reel packaging. Confirm the manufacturer is Microsemi Corporation and check for physical integrity of the T-18 package. Ensure documentation aligns with the provided datasheet specifications before finalizing procurement.

Selection Notes

Select this component when a 5-watt axial Zener diode with a 100V breakdown voltage is required. Consider the B suffix tolerance if standard precision is sufficient. Evaluate thermal management requirements based on the junction-to-lead thermal resistance. Verify compatibility with existing circuit designs requiring robust surge handling capabilities.

Part Context

This device is part of the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series offers a wide selection of voltages from 3.3V to 200V with various tolerance options identified by specific suffix letters. These components are designed for applications requiring reliable voltage regulation and high power dissipation.

Replacement Considerations

Equivalent parts include other manufacturers' 1N5378 variants meeting the same electrical specifications. Surface mount equivalents such as SMBJ5378CE3 are available for space-constrained designs. Ensure any substitute maintains the 5W power rating and 100V Zener voltage characteristics.

FAQ

What is the moisture classification of the 1N5378E3/TR8?

The device has a moisture classification of Level 1 per IPC/JEDEC J-STD-020B, meaning no dry pack is required.

How is polarity indicated on the 1N5378E3/TR8?

Polarity is indicated by a band on the cathode end. The diode must be operated with the banded end positive with respect to the opposite end.