1N5374A/TR8

Overview

The Microsemi Corporation 1N5374A/TR8 is a silicon unidirectional Zener diode with a nominal voltage of 75 V and a power dissipation rating of 5.0 W at 25 °C. It features an axial-lead T-18 plastic package and provides a standard voltage tolerance of ±10%. The device operates within a temperature range of -65 °C to +150 °C, exhibits a maximum dynamic impedance of 45 Ω, and has a maximum reverse current of 0.5 μA.

Feature Summary

• Provides stable voltage regulation across broad operating current and temperature ranges
• Features flexible axial-lead mounting terminals for through-hole integration
• Withstands high surge stresses and demonstrates minimal changes in voltage versus current
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring robust thermal performance
• Power supply protection against transient overvoltage events
• Reference voltage generation in industrial control systems

Procurement Notes

Verify the specific suffix 'TR8' corresponds to tape and reel packaging as defined by EIA-296 standards. Confirm that the component meets the required JEDEC registration specifications for the 1N5333-5388B series. Ensure the ordering documentation explicitly states the ±10% tolerance associated with the 'A' designation. Validate compliance requirements against the manufacturer's official datasheet before finalizing procurement orders.

Selection Notes

Select this component when a 75 V breakdown voltage with ±10% tolerance is required for high-power applications. The 5.0 W dissipation rating supports operation at high DC currents provided adequate heat sinking is implemented. Consider the low thermal resistance design for efficient heat transfer. Verify that the T-18 axial lead package fits the available board space and mounting constraints.

Part Context

This part belongs to the JEDEC registered 1N5333-5388B series of silicon 5-watt Zener diodes manufactured by Microsemi. The series offers a wide selection of voltages from 3.3 V to 200 V. Different tolerances are identified by specific suffix letters on the part number, allowing for precise selection based on circuit requirements.

Replacement Considerations

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