1N5387/TR8

Overview

The Microsemi Corporation 1N5387/TR8 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, designed for voltage regulation across broad operating current and temperature ranges. It features a T-18 axial-lead plastic encapsulated package with void-free transfer molded thermosetting epoxy meeting UL94V-0 standards. The device provides a nominal Zener voltage of 190 V with a ±5% tolerance (B suffix) and operates within a temperature range of -65°C to +150°C. It includes a TR suffix indicating tape and reel packaging per EIA-296 standards.

Feature Summary

• Provides stable voltage regulation over a wide operating current and temperature range
• Features flexible axial-lead mounting terminals in a robust T-18 plastic package
• Withstands high surge stresses and exhibits minimal changes of voltage versus current
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection applications
• Reference voltage generation in electronic systems

Procurement Notes

Verify the specific ordering suffixes against official Microsemi documentation to confirm exact electrical tolerances and compliance status. Confirm that the TR suffix aligns with required tape and reel specifications. Ensure compatibility with existing thermal management designs due to the 5W power dissipation rating. Check for RoHS compliant alternatives if environmental regulations require lead-free components.

Selection Notes

Select this component when a 190 V Zener voltage with tight ±5% tolerance is required in a through-hole configuration. Consider the T-18 package dimensions and thermal resistance characteristics for adequate heat sinking. Evaluate the maximum DC current capabilities relative to the intended application's steady-state power dissipation requirements.

Part Context

This part belongs to the Microsemi 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 devices are designed for high reliability and are available in military equivalent screening levels upon request.

Replacement Considerations

RoHS compliant equivalents are available by adding the e3 suffix to the base part number.