1N5382/TR8

Overview

The Microsemi Corporation 1N5382/TR8 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333B through 1N5388B series, designed for voltage regulation across broad operating current and temperature ranges. It features a T-18 axial-lead package with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards. The device operates within a temperature range of -65°C to +150°C and withstands high surge stresses. Electrical characteristics include a nominal Zener voltage of 140 V, a maximum dynamic impedance of 230 Ohms at a test current of 8.0 mA, and a maximum reverse leakage current of 0.5 µA. The TR8 suffix indicates tape and reel packaging compliant with EIA-296.

Feature Summary

• Provides stable voltage regulation over wide operating current and temperature variations
• Withstands high surge stresses and exhibits minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals suitable for through-hole applications
• 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 sources in measurement equipment

Procurement Notes

Verify the specific suffix requirements for your application, as the 'TR' designation confirms tape and reel packaging while standard versions may differ. Confirm RoHS compliance status by checking for the 'e3' suffix, as non-compliant variants exist within this series. Ensure adequate heat sinking is provided during operation to maintain performance within the specified thermal resistance limits and prevent exceeding the maximum power dissipation rating.

Selection Notes

Select this component when a 140 V Zener voltage with ±5% tolerance is required for high-power applications up to 5 watts. Consider the T-18 package dimensions and lead spacing for PCB layout compatibility. Evaluate thermal management strategies based on the junction-to-lead thermal resistance of 25°C/W to ensure reliable operation under steady-state conditions. Verify that the maximum regulator current and surge current ratings align with the circuit's operational demands.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series offers a wide selection of Zener voltages ranging from 3.3 V to 200 V, catering to diverse voltage regulation needs. These devices are JEDEC registered and available in various tolerance levels identified by suffix letters, such as B for ±5%. The series also includes military equivalent screening options and surface mount equivalents like the SMBJ series.

Replacement Considerations

Equivalent parts within the same series include 1N5381B and 1N5383B, which share identical mechanical and thermal characteristics but offer different Zener voltages. Surface mount alternatives such as SMBJ5382B provide similar electrical performance in a compact footprint. When substituting, verify that the replacement part meets the required voltage tolerance, power dissipation, and package type specifications.