1N5381C/TR12

Overview

The Microsemi 1N5381C/TR12 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation with a nominal Zener voltage of 130V and a tight tolerance of ±2%, indicated by the 'C' suffix. The device operates in an axial lead T-18 package, featuring void-free transfer molded epoxy construction. It supports high maximum DC currents when adequately heat sunk, offering minimal voltage change versus current variations across a broad operating temperature range.

Feature Summary

• Provides precise voltage regulation within a ±2% tolerance band
• Handles high surge stresses and steady-state power dissipation up to 5 watts
• Features flexible axial-lead mounting terminals for versatile integration
• Constructed with moisture classification Level 1 requiring no dry pack

Applications

• Voltage regulation circuits requiring stable reference levels
• Power supply protection against overvoltage conditions
• Clamping applications in electronic systems

Procurement Notes

Verify the specific suffix configuration matches the required tolerance and packaging format. Confirm that the TR12 designation aligns with tape and reel requirements if applicable. Ensure thermal management strategies account for the specified junction-to-lead thermal resistance during operation. Cross-reference the part number with official Microsemi documentation to validate availability and screening levels before procurement.

Selection Notes

Select this component when a 130V Zener voltage with ±2% precision is required in a 5-watt axial package. Consider the thermal derating curves for ambient temperature constraints. Evaluate the dynamic impedance characteristics for noise-sensitive applications. Compare against standard ±5% variants if tighter tolerances are not critical for the design.

Part Context

This device belongs to the Microsemi Scottsdale Division's 1N5333B through 1N5388B series of silicon Zener diodes. The series offers a wide selection of voltages from 3.3V to 200V. The 1N5381 variant specifically targets the 130V regulation point. The C suffix denotes the tighter manufacturing tolerance compared to the standard B suffix devices.

Replacement Considerations

Equivalent parts include other manufacturers' 1N5381 series diodes meeting 5W and 130V specifications. Verify pinout compatibility and thermal performance characteristics. Ensure replacement components meet the same environmental and electrical standards as the original specification.