1N5355AE3/TR8

Overview

The Microchip Technology 1N5355AE3/TR8 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, manufactured by the Microsemi Scottsdale Division. It provides voltage regulation at a nominal Zener voltage of 18V with a standard tolerance of ±10%, indicated by the 'A' suffix. The device operates within a temperature range of -65°C to +150°C and features a T-18 axial lead package. Electrical characteristics include a maximum dynamic impedance of 2.5 ohms and a maximum reverse current of 0.5 µA. The component is RoHS compliant due to the 'e3' suffix and is available in tape and reel packaging.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

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

Procurement Notes

Verify the specific suffixes on the part number to confirm exact electrical tolerances and compliance status. The 'A' suffix denotes a ±10% voltage tolerance, while the 'e3' suffix indicates RoHS compliance. Confirm that the 'TR8' designation matches the required tape and reel packaging format for automated assembly processes. Ensure the manufacturer source is verified as Microchip or authorized distributors.

Selection Notes

Select this component when a 5-watt power dissipation rating and an 18V regulation point are required. The ±10% tolerance offers a balance between cost and precision for general-purpose applications. Consider the thermal resistance and derating curves if operating near the maximum temperature limits or in confined spaces without adequate heat sinking.

Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes originally developed by Microsemi's Scottsdale Division. The series covers a wide voltage selection from 3.3V to 200V with various tolerance options identified by suffix letters. The product line is characterized by low thermal resistance and robust construction suitable for high-current operations with proper heat management.

Replacement Considerations

Direct substitutes within the same series include other 1N53xx variants with different voltage ratings but identical power and package specifications. Cross-referencing should focus on matching the 18V Zener voltage, 5W power rating, and T-18 axial package dimensions.