1N5377C/TR12

Overview

The Microsemi Corporation 1N5377C/TR12 is a silicon 5.0-watt Zener diode with a nominal voltage of 91 V and a ±2% tolerance, indicated by the C suffix. It features an axial-lead T-18 package and operates within a temperature range of -65°C to +150°C. The device includes a TR suffix for tape and reel packaging. Electrical characteristics include a maximum dynamic impedance of 75 Ohms at a test current of 15 mA, a reverse leakage current of 500 µA at 65.5 V, and a forward voltage of 1.2 V maximum at 1.0 A.

Feature Summary

• Provides precise voltage regulation with tight ±2% tolerance suitable for sensitive circuits
• Capable of handling high surge stresses and steady-state power dissipation up to 5 watts
• Features flexible axial-lead mounting terminals for through-hole applications
• Moisture classification Level 1 requiring no dry pack storage

Applications

• Voltage regulation in broad operating current and temperature ranges
• High-density circuit designs requiring specific voltage tolerances
• Applications needing protection against high surge stresses

Procurement Notes

Verify the part number suffixes carefully, as they define critical attributes. The 'C' suffix confirms the ±2% voltage tolerance, while 'TR12' indicates tape and reel packaging. Confirm RoHS compliance via the 'e3' designation if required. Check manufacturer status as this series may be subject to discontinuation or lifecycle changes. Ensure thermal management aligns with the specified derating curves for your application.

Selection Notes

Select this component when a 91 V Zener voltage with high precision (±2%) is required. The T-18 axial package suits through-hole mounting where space allows. Consider the 5-watt power rating and thermal resistance for heat sinking requirements. Compare against B suffix variants if looser tolerances are acceptable for cost reduction. Verify lead length specifications for PCB layout compatibility.

Part Context

This part belongs to the JEDEC registered 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series offers a wide selection of voltages from 3.3 V to 200 V. Different suffix letters identify voltage tolerances, with C denoting ±2%. The series is available in various screening levels and packaging options, including surface mount equivalents.

Replacement Considerations

Equivalent parts include other manufacturers' 1N5377 series diodes with matching 91 V and 5 W ratings. For tighter tolerance needs, verify that substitutes offer ±2% or better. Surface mount alternatives like SMBG5377 provide similar electrical characteristics in a different package form factor.