1N5374B

Overview

The Microsemi Corporation 1N5374B is a silicon unidirectional voltage regulator diode belonging to the JEDEC registered 1N5333-5388B series. It provides a nominal Zener voltage of 75 V with a standard tolerance of ±5%, indicated by the B suffix. The device features a maximum power dissipation of 5.0 watts at 25°C and operates within a temperature range of -65°C to +150°C. Electrical characteristics include a test current of 20 mA, a maximum dynamic impedance of 45 Ohms, and a maximum reverse leakage current of 0.5 µA. It utilizes a T-18 axial-lead plastic encapsulated package.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal voltage changes versus current
• Features flexible axial-lead mounting terminals for versatile installation
• 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 ordering suffix matches the required specifications. The 'B' suffix confirms a ±5% voltage tolerance. Confirm RoHS compliance status if environmental regulations apply, as non-compliant variants exist within the broader product family. Ensure the manufacturer designation corresponds to Microsemi or its authorized successors to guarantee datasheet accuracy.

Selection Notes

Select this component when a 75 V regulation point is required with moderate precision. The 5-watt power rating supports high DC currents provided adequate heat sinking is implemented. Consider the thermal resistance values for PCB layout planning. Verify that the operating environment falls within the specified -65°C to +150°C range for reliable performance.

Part Context

This part belongs to the 1N5333B through 1N5388B series of 5.0-watt silicon Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a wide voltage selection from 3.3 V to 200 V. These devices are designed for applications requiring robust voltage regulation and high peak reverse power dissipation capabilities.

Replacement Considerations

Equivalent parts may be found within the same 1N5333-5388 series from other manufacturers adhering to JEDEC standards. Verify mechanical dimensions and pinout compatibility before substitution.