1N5374A/TR12

Overview

The Microsemi Corporation 1N5374A/TR12 is a silicon 5.0-watt Zener diode in the JEDEC registered 1N5333-5388B series, housed in an axial-lead T-18 plastic package with a TR suffix for tape and reel packaging. It provides voltage regulation at a nominal Zener voltage of 75V with a ±10% tolerance. The device operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 45 ohms at a test current of 20mA. It withstands high surge stresses and exhibits minimal voltage changes versus current.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and is nonsensitive to electrostatic discharge
• Features flexible axial-lead mounting terminals for through-hole integration
• 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 generation in measurement equipment

Procurement Notes

Verify that the part number includes the 'TR' suffix to confirm tape and reel packaging rather than bulk or cut tape. Confirm the 'A' suffix indicates the required ±10% voltage tolerance. Ensure the component meets specific military screening requirements if applicable, as standard commercial versions differ from screened equivalents. Check for RoHS compliance status based on the presence of the 'e3' suffix if lead-free materials are mandated.

Selection Notes

Select this component when a 75V Zener reference with moderate precision is required in a high-power 5W application. The T-18 package supports high maximum DC currents provided adequate heat sinking is implemented. Consider the thermal resistance characteristics and derating curves for steady-state power dissipation calculations. Verify that the ±10% tolerance aligns with the circuit design specifications before finalizing the selection.

Part Context

This device 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 voltages from 3.3V to 200V with various tolerance options identified by suffix letters. These plastic encapsulated diodes are designed for applications requiring robust performance under high surge stresses and broad temperature variations.

Replacement Considerations

Equivalent parts include other 5W Zener diodes with a 75V nominal voltage and similar axial T-18 packaging. Verify that replacement devices match the maximum dynamic impedance and reverse leakage current specifications. Ensure the thermal resistance and power derating characteristics of the substitute component are compatible with the existing heat sinking design.