1N5386B/TR12

Overview

The Microsemi 1N5386B/TR12 is a silicon Zener diode with a nominal voltage of 180V and ±5% tolerance. It operates in a T-18 axial lead package, dissipating up to 5W at 25°C. The device features a maximum reverse current of 0.5µA at 130V and a dynamic impedance of 430Ω. It withstands surge currents up to 1750A and maintains operation between -65°C and +150°C.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Features flexible axial-lead mounting terminals for secure mechanical attachment

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in measurement instrumentation

Procurement Notes

Verify the specific suffix configuration against project requirements. Confirm that the TR12 tape and reel packaging aligns with automated assembly equipment specifications. Ensure compliance with environmental directives if RoHS status is mandatory for the final product integration.

Selection Notes

Select this component when an 180V regulation point is required within the 5W power class. Consider the thermal resistance characteristics and heat sinking needs for steady-state operation. Evaluate the ±5% tolerance against circuit sensitivity requirements compared to tighter tolerance alternatives.

Part Context

This part belongs to the JEDEC registered 1N5333B through 1N5388B series of 5-watt Zener diodes. The series covers voltages from 3.3V to 200V. The 'B' suffix indicates standard ±5% tolerance. The 'TR12' suffix denotes tape and reel packaging options available for this family.

Replacement Considerations

Equivalent parts include other manufacturers' 1N5386B variants. Verify pinout compatibility and thermal performance curves before substitution. Cross-reference MIL-PRF-19500 screening levels if military-grade reliability is required.