1N5386B

Overview

The Microsemi Corporation 1N5386B is a silicon unidirectional voltage regulator diode with a nominal Zener voltage of 180 V and a maximum power dissipation of 5.0 W at 25°C. It features a standard voltage tolerance of ±5% and operates within an ambient temperature range of -65°C to +150°C. The device utilizes a T-18 axial lead package with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards. Electrical characteristics include a maximum dynamic impedance of 430 Ohms, a maximum reverse current of 0.5 µA, and a maximum surge current of 1750 A.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and non-repetitive peak currents
• Features flexible axial-lead mounting terminals for through-hole applications
• Moisture classification Level 1 requiring no dry pack storage

Applications

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

Procurement Notes

Verify the specific suffix letter on the part number to confirm the exact voltage tolerance, as the B suffix indicates ±5%. Confirm RoHS compliance status by checking for the e3 suffix if required. Ensure adequate heat sinking is provided during operation to maintain performance within the specified thermal resistance limits.

Selection Notes

Select this component when a 180 V regulation point is required with a ±5% tolerance. Consider the 5 W power rating and ensure appropriate thermal management is implemented. Verify that the axial lead form factor fits the target PCB layout constraints.

Part Context

This component belongs to the JEDEC registered 1N5333B through 1N5388B series of 5-watt silicon Zener diodes. The series covers a wide voltage selection from 3.3 V to 200 V. Different tolerance levels are available via specific suffix letters, allowing designers to choose between standard and tight voltage specifications.

Replacement Considerations

Surface mount equivalents are available in the SMBJ5333B to SMBJ5388B or SMBG5333B to SMBG5388B series.