1N5373E3/TR8

Overview

The Microchip Technology 1N5373E3/TR8 is a silicon Zener diode with a nominal voltage of 68 V and a ±5% tolerance. It operates in the 1N5333-5388B series, providing 5.0 watts of power dissipation at 25°C. The device features an axial lead T-18 package and supports tape and reel packaging. Electrical characteristics include a test current of 20 mA, maximum dynamic impedance of 44 ohms, and maximum reverse current of 0.5 µA.

Feature Summary

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

Applications

• Voltage regulation circuits
• Surge protection systems
• Reference voltage generation

Procurement Notes

Verify component authenticity by checking manufacturer markings against datasheet specifications. Confirm RoHS compliance via the e3 suffix and ensure the TR8 designation matches required tape and reel packaging standards. Validate that the part number corresponds to the specific 68 V variant within the 1N5333-5388B series before procurement.

Selection Notes

Select this component for applications requiring precise 68 V regulation with tight ±5% tolerance. Ensure adequate heat sinking is provided to maintain operation within the 5-watt power dissipation limit. Verify that the axial lead configuration fits the target PCB layout and that the operating temperature range aligns with system requirements.

Part Context

This device belongs to the JEDEC registered 1N5333-5388B series of 5-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers voltages from 3.3 V to 200 V with various tolerance options identified by suffix letters. The 1N5373 variant specifically targets the 68 V segment of this wide-range selection.

Replacement Considerations

Consult official Microchip documentation for verified substitute part numbers or equivalent screening levels such as JAN, JANTX, or JANTXV variants.