1N5387B/TR8

Overview

The Microsemi Corporation 1N5387B/TR8 is a silicon 5-watt Zener diode with a nominal voltage of 190 V and ±5% tolerance. It features a T-18 axial leaded plastic package, operates from -65°C to +150°C, and has a maximum reverse leakage current of 500 nA at 137 V. The device exhibits a maximum dynamic impedance of 450 ohms and a forward voltage of 1.2 V at 1 A.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and offers minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals for through-hole integration

Applications

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

Procurement Notes

Verify the exact suffix configuration against official Microsemi documentation before procurement. Confirm that the TR8 tape and reel packaging meets specific handling requirements. Ensure compliance with RoHS status and moisture sensitivity level classifications as defined in the datasheet.

Selection Notes

Select this component when a 190 V Zener voltage with tight ±5% tolerance is required. Consider the 5 W power dissipation capability and thermal resistance characteristics for adequate heat sinking. Verify that the T-18 axial lead package fits the intended PCB layout constraints.

Part Context

This part belongs to the JEDEC registered 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The 'B' suffix indicates a standard ±5% voltage tolerance. The 'TR8' suffix designates the tape and reel packaging option per EIA-296 standards.

Replacement Considerations

Consult Microsemi's official cross-reference documentation for verified substitutes. Equivalent parts must match the 190 V nominal voltage, 5 W power rating, and T-18 package dimensions.