1N5386B/TR8

Overview

The Microsemi Corporation 1N5386B/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 180 V with a standard tolerance of ±5%, indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +150°C and utilizes an axial-lead T-18 package. Electrical characteristics include a maximum dynamic impedance of 430 Ohms at a test current of 5.0 mA, a maximum reverse leakage current of 0.5 µA, and a maximum regulator current of 26.4 mA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals suitable for through-hole PCB integration
• Withstands high surge stresses and exhibits minimal voltage change versus current variations
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required packaging configuration, as the TR designation indicates tape and reel availability. Confirm compliance requirements against specific project standards, noting that RoHS compliant variants utilize the e3 suffix. Ensure the procurement specification aligns with the manufacturer's current datasheet revisions to avoid discrepancies in electrical parameters or mechanical dimensions.

Selection Notes

Select this component when a precise 180 V reference with tight ±5% tolerance is required for high-power dissipation scenarios up to 5 watts. Consider the thermal resistance characteristics and derating curves if operating near maximum ratings. Evaluate the axial lead form factor against available board space and verify that the maximum surge current capability meets the expected transient stress conditions of the target application environment.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi. The series covers a wide voltage selection from 3.3 V to 200 V, utilizing specific suffix letters to denote voltage tolerances. These plastic encapsulated devices are moisture classification Level 1 and offer various military equivalent screening levels via prefix identifiers.

Replacement Considerations

Direct replacements within the same family include other 1N538xB series parts with different voltage ratings. Cross-manufacturer equivalents should be verified against the 180 V Zener voltage, 5 W power dissipation, and T-18 axial package constraints.