1N5388B/TR12

Overview

The Microsemi Corporation 1N5388B/TR12 is a silicon 5.0-watt Zener diode with a nominal voltage of 200 volts and a ±5% tolerance. It operates within a temperature range of -65°C to +150°C, featuring a maximum reverse current of 0.5 µA at 144 V and a dynamic impedance of 480 ohms. The component utilizes an axial-lead T-18 plastic package and is supplied in tape-and-reel format.

Feature Summary

• Provides stable voltage regulation across broad operating currents and temperatures
• Withstands high surge stresses without failure
• Features flexible axial-lead mounting terminals for versatile installation

Applications

• Voltage regulation circuits requiring high power dissipation
• Surge protection applications
• High-current DC operation with adequate heat sinking

Procurement Notes

Verify the specific suffix configuration against official datasheets to confirm tolerance levels and compliance status. Ensure that thermal management requirements are met during integration, as performance depends on proper heat sinking. Confirm moisture classification and packaging specifications align with assembly processes.

Selection Notes

Select this component when high-power voltage regulation is required in a through-hole axial package. Consider the thermal resistance characteristics and derating curves for ambient temperature conditions. Verify that the 200-volt rating matches the circuit's operational limits and surge requirements.

Part Context

This device belongs to the JEDEC registered 1N5333B through 1N5388B series of 5.0-watt Zener diodes. The series offers a wide selection of voltages from 3.3 to 200 volts with various tolerance options identified by suffix letters. These components are designed for robust performance in demanding electronic environments.

Replacement Considerations

Surface mount equivalents such as SMBJ5388B or SMBG5388B are available. Military screening options include prefixes MQ, MX, or MV for JAN, JANTX, and JANTXV variants respectively.