1N5374B/TR12

Overview

The Microsemi Corporation 1N5374B/TR12 is a silicon Zener diode with a nominal voltage of 75V and a tolerance of ±5%. It features a maximum power dissipation of 5.0 watts at 25°C, operating within a temperature range of -65°C to +150°C. The device utilizes an axial-lead T-18 plastic package and includes a tape and reel option indicated by the TR suffix. Electrical characteristics include a test current of 20mA, a maximum dynamic impedance of 45 ohms, and a maximum reverse current of 0.5µA.

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 versatile 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 specific part number matches the required electrical parameters, including the 75V Zener voltage and ±5% tolerance. Confirm the presence of the TR suffix indicates tape and reel packaging rather than bulk. Ensure compliance with RoHS requirements if applicable, as standard B suffix devices may contain lead. Cross-reference the manufacturer's datasheet for thermal derating curves to ensure adequate heat sinking for the intended application.

Selection Notes

Select this component when a 75V regulation point is required with moderate precision. The 5-watt power rating allows for higher current handling compared to lower-power variants. Consider the axial lead format for through-hole mounting. Evaluate thermal management needs based on the junction-to-lead thermal resistance. Compare against other tolerances like A (±10%) or C (±2%) if tighter voltage control is necessary.

Part Context

This device belongs to the JEDEC registered 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series covers a wide voltage range from 3.3V to 200V. The 1N5374B specifically targets the mid-range voltage applications within this family. The TR suffix denotes a specific packaging configuration for automated assembly processes.

Replacement Considerations

Equivalent parts within the same series include 1N5373B (68V) and 1N5375B (82V). Military screening options are available with MQ, MX, or MV prefixes. Surface mount equivalents exist in the SMBJ and SMBG series.