1N5378AE3/TR8

Overview

The Microsemi 1N5378AE3/TR8 is a silicon 5-watt Zener diode with a nominal voltage of 100V and ±10% tolerance. It operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 90 ohms at a test current of 12mA. The device withstands a maximum surge current of 800A and exhibits a maximum reverse current of 0.5µA. Packaged in an axial-lead form factor, it offers low thermal resistance for high DC current operation with adequate heat sinking.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and minimal changes in voltage versus current
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020
• Flexible axial-lead mounting terminals with void-free transfer molded epoxy body

Applications

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

Procurement Notes

Verify the specific suffix configuration against the datasheet to confirm tolerance and packaging. The 'E3' suffix indicates RoHS compliance, while 'TR8' denotes tape and reel packaging. Ensure the ordering part number matches the required JEDEC registration and screening level. Confirm lead material specifications if tin-lead plating is preferred over matte-tin. Cross-reference the manufacturer's latest documentation for any updates to mechanical dimensions or electrical characteristics.

Selection Notes

Select this component when a 100V Zener reference with ±10% tolerance is required in a 5-watt axial package. Consider the thermal resistance of 25°C/W junction-to-lead for heat sinking requirements. Evaluate the dynamic impedance and knee impedance values for regulation precision needs. Compare against other suffixes like B (±5%) or C/D (tighter tolerances) if stricter voltage accuracy is necessary for the application design.

Part Context

This part belongs to the Microsemi 1N5333B through 1N5388B series of JEDEC registered silicon Zener diodes. The series covers voltages from 3.3V to 200V with various tolerance options. The 1N5378 variant specifically targets the 100V regulation point. The e3 suffix confirms environmental compliance, while TR8 specifies bulk tape and reel delivery for automated assembly processes.

Replacement Considerations

Equivalent parts include other manufacturers' 1N5378 variants with matching 100V and 5W ratings. Verify pinout compatibility and thermal performance characteristics before substitution. Ensure the replacement meets the same JEDEC registration standards and moisture classification Level 1 requirements.