1N5355/TR8

Overview

The Microchip Technology 1N5355/TR8 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, manufactured by the Scottsdale Division. It provides voltage regulation at a nominal Zener voltage of 17 volts with a ±5% tolerance (B suffix). The device operates within a temperature range of -65°C to +150°C and features an axial-lead T-18 package. The TR8 suffix indicates tape and reel packaging compliant with EIA-296 standards.

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
• Moisture classification Level 1 requiring no dry pack storage

Applications

• Voltage regulation in power supply circuits
• Reference voltage generation in electronic systems
• Protection against transient overvoltage events

Procurement Notes

Verify the specific manufacturer origin, as this part number originates from the Microsemi Scottsdale Division which was acquired by Microchip Technology. Confirm that the RoHS status aligns with project requirements, noting that standard versions may not be compliant unless specified with the e3 suffix. Ensure the tape and reel packaging matches automated assembly equipment specifications.

Selection Notes

Select this component when a 5-watt power dissipation rating is required for high-current regulation tasks. The 17-volt output suits applications needing precise reference levels within the mid-range of the 3.3V to 200V series. Consider the thermal resistance characteristics and ensure adequate heat sinking or copper pad layout on the PCB to maintain junction temperatures within safe limits during operation.

Part Context

This device belongs to the 1N5333B through 1N5388B family of silicon Zener diodes. These components are characterized by void-free transfer molded thermosetting epoxy bodies meeting UL94V-0 flammability ratings. The series offers various tolerance options identified by suffix letters, allowing designers to choose between standard and tight voltage accuracy specifications based on circuit sensitivity.

Replacement Considerations

Equivalent parts include other 5-watt Zener diodes with a 17V nominal voltage and ±5% tolerance. Verify mechanical compatibility with the T-18 axial leaded package and confirm electrical parameters such as dynamic impedance and maximum reverse current match the original design constraints.