1N5378AE3/TR12

Overview

The Microsemi Corporation 1N5378AE3/TR12 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333B through 1N5388B series. It provides voltage regulation at a nominal Zener voltage of 100 V with a standard tolerance of ±10%, indicated by the 'A' suffix. The device features an axial-lead T-18 package and RoHS compliance, denoted by the 'e3' suffix. Electrical characteristics include a maximum dynamic impedance of 90 Ohms and a maximum reverse current of 0.5 µA tested at 72 V. It operates within a temperature range of -65°C to +150°C.

Feature Summary

• Provides stable voltage regulation across broad operating current and temperature ranges
• Withstands high surge stresses and offers flexible axial-lead mounting terminals
• Features minimal changes in voltage versus current as specified by voltage regulation parameters

Applications

• Voltage regulation circuits requiring robust thermal performance
• Power supply protection against high surge stresses
• General-purpose voltage reference applications in industrial environments

Procurement Notes

Verify that the ordering suffix matches the required specifications: 'A' for ±10% tolerance, 'e3' for RoHS compliance, and 'TR12' for tape and reel packaging. Confirm the manufacturer designation is Microsemi Corporation or its successor entity. Ensure the component meets the specific moisture classification Level 1 requirements without dry pack constraints if applicable to the assembly process.

Selection Notes

Select this component when a 100 V Zener voltage with ±10% tolerance is required in a 5-watt axial leaded package. Consider the low thermal resistance design for applications needing high maximum DC currents with adequate heat sinking. Verify compatibility with surface mount equivalents like SMBJ5378AE3 if space constraints necessitate a change in form factor while maintaining electrical performance.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a wide selection of voltages from 3.3 V to 200 V. The 1N5378AE3 variant specifically addresses the 100 V segment with standard commercial tolerances, offering a reliable solution for general voltage regulation tasks within the broader family of plastic encapsulated Zeners.

Replacement Considerations

Surface mount equivalent: SMBJ5378AE3/TR13. This alternative maintains the same 100 V rating and 5 W power dissipation but utilizes a DO-214AA (SMB) package instead of the axial T-18 leaded format.