1N5378BE3/TR12

Overview

The Microsemi Corporation 1N5378BE3/TR12 is a silicon Zener diode from the JEDEC registered 1N5333B-1N5388B series. It provides voltage regulation at a nominal Zener voltage of 100 V with a ±5% tolerance, indicated by the 'B' suffix. The device features a maximum power dissipation of 5.0 watts and operates within a temperature range of -65°C to +150°C. It utilizes an axial-lead T-18 package and includes RoHS compliance via the 'e3' suffix for matte tin plating. The 'TR12' suffix designates tape and reel packaging per EIA-296 standards.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses with minimal changes in voltage versus current
• Flexible axial-lead mounting terminals suitable for various mechanical configurations
• Moisture classification Level 1 requiring no dry pack storage

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage sources in measurement equipment

Procurement Notes

Verify that the ordering suffixes match specific requirements: 'e3' confirms lead-free RoHS compliance, while 'TR12' indicates tape and reel packaging. Confirm the 'B' suffix corresponds to the required ±5% voltage tolerance. Ensure the component meets MIL-PRF-19500 screening levels if military equivalent specifications are necessary for the application.

Selection Notes

Select this component when a 100 V Zener voltage with ±5% tolerance is required for 5 W power dissipation applications. Consider the thermal resistance characteristics and derating curves for adequate heat sinking. Verify compatibility with the T-18 axial-lead package dimensions and ensure the operating temperature range aligns with system environmental conditions.

Part Context

This part belongs to the Microsemi Scottsdale Division 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series offers a wide selection of voltages from 3.3 V to 200 V with various tolerance options identified by suffix letters. These plastic encapsulated devices are designed for high maximum DC currents and feature low thermal resistance designs.

Replacement Considerations

Surface mount equivalents such as SMBJ5378B or SMBG5378B are available from the same manufacturer. For non-RoHS compliant replacements, the 1N5378B variant without the e3 suffix may be considered. Military screening prefixes MQ, MX, or MV can be added to the base part number for JAN, JANTX, or JANTXV levels respectively.