1N5381/TR12

Overview

The Microsemi Corporation 1N5381/TR12 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333B through 1N5388B series, designed for voltage regulation applications. It features a T-18 axial-lead plastic encapsulated package with void-free transfer molded thermosetting epoxy meeting UL94V-0 standards. The device provides a nominal Zener voltage of 130 volts with a standard tolerance of plus or minus 5 percent, indicated by the B suffix. It operates within an ambient temperature range of -65°C to +150°C and includes a tape and reel packaging option as specified by the TR suffix.

Feature Summary

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

Applications

• Voltage regulation circuits requiring high power dissipation capabilities
• Power supply protection against overvoltage conditions
• Reference voltage generation in industrial instrumentation systems

Procurement Notes

Verify that the ordering suffix matches the required electrical tolerances and packaging format. Confirm RoHS compliance status based on the specific e3 designation if lead-free terminals are mandated. Ensure the supplier documentation aligns with the JEDEC registration standards for the 1N5333B through 1N5388B series to guarantee authentic performance characteristics.

Selection Notes

Select this component when a 5-watt power rating and a 130-volt breakdown voltage are necessary for circuit stability. Consider the thermal resistance characteristics and derating curves for proper heat sinking requirements. Evaluate the mechanical dimensions of the T-18 package to ensure compatibility with the intended printed circuit board layout and mounting constraints.

Part Context

This part belongs to the widely used 1N5333B through 1N5388B series of axial-leaded Zener diodes manufactured by Microsemi. The series covers a voltage selection from 3.3 to 200 volts with various tolerance options identified by suffix letters. These devices are known for their low thermal resistance design, allowing operation at high maximum DC currents when adequately heat sunk.

Replacement Considerations

Equivalent parts include other manufacturers' 5-watt Zener diodes with a 130-volt rating and T-18 package. Verify that substitute components meet the same JEDEC registration standards and possess comparable dynamic impedance and surge current ratings.