1N5373/TR8

Overview

The Microchip Technology 1N5373/TR8 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333B through 1N5388B series. It provides voltage regulation at a nominal Zener voltage of 68 V with a ±5% tolerance, indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +150°C and features an axial-lead T-18 package. Electrical characteristics include a test current of 20 mA, a maximum dynamic impedance of 44 Ohms, and a maximum reverse current of 0.5 µA. The component is supplied in tape and reel packaging.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals for standard through-hole applications
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

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

Procurement Notes

Verify the specific ordering suffixes against official documentation to confirm compliance requirements and packaging options. Ensure that the selected variant matches the required voltage tolerance and screening level for the intended application environment. Confirm availability status directly with authorized distributors or the manufacturer prior to procurement planning.

Selection Notes

Select this component based on the required 68 V regulation point and 5 W power dissipation capability. Consider the thermal resistance and derating curves when designing heat sinking solutions. Verify that the ±5% tolerance meets the circuit precision requirements and that the axial lead configuration fits the PCB layout constraints.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers a wide selection of voltages from 3.3 V to 200 V with various tolerance options identified by suffix letters. These devices are designed for high DC currents with adequate heat sinking and feature void-free transfer molded epoxy bodies.

Replacement Considerations

Compatible substitutes within the same series include 1N5372B and 1N5374B, which share identical mechanical and electrical specifications except for their nominal Zener voltages.