1N5373AE3/TR12

Overview

The Microchip Technology 1N5373AE3/TR12 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation at a nominal Zener voltage of 68 V with a ±10% tolerance, indicated by the 'A' suffix. The device operates in an axial T-18 package and supports a test current of 20 mA. Key electrical characteristics include a maximum dynamic impedance of 44 Ohms and a maximum reverse leakage current of 0.5 µA. It withstands a maximum surge current of 500 A and functions within a temperature range of -65°C to +150°C.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and offers minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals for through-hole integration
• Compliant with RoHS standards and moisture classification Level 1

Applications

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

Procurement Notes

Verify the component status as this part may be subject to discontinuation or limited availability. Confirm that the specific ordering suffix matches the required tolerance and packaging format. Ensure compliance with environmental regulations such as RoHS. Check for any applicable military screening prefixes if higher reliability is required. Validate thermal management requirements against the datasheet derating curves.

Selection Notes

Select this component when a 68 V regulation point is required with moderate precision. The ±10% tolerance suits general-purpose applications where tighter tolerances are unnecessary. Consider the 5 W power dissipation capability and ensure adequate heat sinking for steady-state operation. Verify that the axial lead form factor fits the PCB layout constraints.

Part Context

This device belongs to the 1N5333B through 1N5388B series of 5-watt silicon Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers a wide voltage range from 3.3 V to 200 V. The 'e3' suffix indicates RoHS compliance, while 'TR12' denotes tape and reel packaging. These diodes are designed for robust performance in industrial and commercial environments.

Replacement Considerations

Compatible substitutes include other 68 V 5 W Zener diodes in the T-18 package with similar electrical characteristics. Verify that alternative parts meet the same power dissipation, impedance, and leakage current specifications. Ensure the replacement maintains the axial lead configuration and thermal resistance properties.