1N5386/TR8

Overview

The Microsemi Corporation 1N5386/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 nominal Zener voltage of 180 V with a standard ±5% tolerance (B suffix). The device operates within a temperature range of -65°C to +150°C and utilizes a T-18 axial-lead package. Electrical characteristics include a maximum dynamic impedance of 430 Ohms at a test current of 5 mA, a maximum reverse leakage current of 0.5 µA, and a steady-state power dissipation of 5 watts.

Feature Summary

• Provides stable voltage regulation over wide operating current and temperature ranges
• Features flexible axial-lead mounting terminals for through-hole applications
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

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

Procurement Notes

Verify component authenticity by checking manufacturer markings against datasheet specifications. Confirm the presence of the TR suffix indicates tape and reel packaging compliant with EIA-296 standards. Ensure the B suffix corresponds to the required ±5% voltage tolerance. Validate that the lead length meets the specified 3/8 inch requirement for accurate thermal resistance calculations during procurement inspection.

Selection Notes

Select this component when a 180 V regulation point is required with moderate precision. The T-18 package supports high DC currents provided adequate heat sinking is implemented. Consider the specific thermal resistance values for junction-to-lead and junction-to-ambient configurations based on the PCB copper pad dimensions and track width used in the design.

Part Context

This part belongs to the 1N5333-5388B series of silicon 5-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a voltage selection from 3.3 V to 200 V, utilizing specific suffix letters to denote different voltage tolerances. These plastic encapsulated devices are moisture classification Level 1 and do not require dry packing.

Replacement Considerations

Surface mount equivalents are available as SMBJ5333 to SMBJ5388B or SMBG5333B to SMBG5388B. RoHS compliant versions can be identified by adding the e3 suffix to the part number.