1N5387C/TR8

Overview

The Microsemi Corporation 1N5387C/TR8 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, designed for voltage regulation applications. It features a nominal Zener voltage of 190 V with a tight tolerance of ±2%, as indicated by the C suffix. The device operates within an ambient temperature range of -65°C to +150°C and utilizes a T-18 axial lead plastic package. Electrical characteristics include a maximum dynamic impedance of 450 Ohms at a test current of 5 mA, a maximum reverse leakage current of 0.5 µA, and a steady-state power dissipation capability of 5 watts.

Feature Summary

• Provides precise voltage regulation with ±2% tolerance via the C suffix designation
• Capable of handling high surge stresses and operating at elevated temperatures up to +150°C
• Features flexible axial-lead mounting terminals in a void-free transfer molded epoxy body
• Moisture classification Level 1 requiring no dry pack storage

Applications

• Voltage regulation circuits requiring stable reference voltages
• High-power protection against overvoltage transients
• Industrial equipment operating in extreme thermal environments

Procurement Notes

Verify the specific suffix 'TR8' corresponds to tape and reel packaging configurations when sourcing. Confirm that the component meets RoHS compliance requirements if applicable, as standard versions may not be compliant. Ensure the procurement channel provides valid traceability documentation for this discontinued or legacy part number.

Selection Notes

Select this component when a 190 V Zener voltage with strict ±2% tolerance is required. The 5-watt power rating necessitates adequate heat sinking or PCB copper pad area to maintain thermal resistance limits. Verify that the circuit design accommodates the specified maximum dynamic impedance and reverse leakage current parameters for the intended application stability.

Part Context

This component 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. The 1N5387 variant specifically targets the 190 V regulation point. The TR8 suffix indicates availability in tape and reel packaging formats suitable for automated assembly processes.

Replacement Considerations

Consult official Microsemi documentation for verified substitute part numbers. Cross-reference electrical parameters such as Zener voltage, tolerance, and power dissipation to ensure functional equivalence.