1N5355C/TR8

Overview

The Microchip Technology 1N5355C/TR8 is a silicon 5-watt Zener diode with a nominal voltage of 18V and a tight tolerance of ±2%. It operates within a temperature range of -65°C to +150°C. The device features a maximum reverse current of 0.5 µA at 13V, a dynamic impedance of 2.5 ohms, and a maximum regulator current of 5.5 A. Packaged in an axial T-18-2 case with a TR suffix for tape and reel delivery, it provides stable voltage regulation across broad operating currents.

Feature Summary

• Provides precise voltage regulation with a tight ±2% tolerance
• Capable of handling high steady-state power dissipation up to 5 watts
• Operates reliably across extreme temperatures from -65°C to +150°C
• Features flexible axial-lead mounting terminals for through-hole integration

Applications

• Voltage reference circuits requiring high precision
• Power supply regulation and protection stages
• Overvoltage protection in industrial equipment

Procurement Notes

Verify the component origin as this part was originally manufactured by Microsemi before acquisition by Microchip Technology. Confirm that the specific ordering suffix matches the required tape and reel packaging configuration. Ensure compatibility with existing thermal management designs due to the 5-watt power rating. Check for any product change notifications or discontinuance notices related to the legacy Microsemi manufacturing lines.

Selection Notes

Select this component when a stable 18V reference with strict ±2% accuracy is required. The 5-watt power rating allows for direct connection to higher current loads without external heat sinks under moderate conditions. Consider the low dynamic impedance for applications demanding minimal voltage fluctuation during current changes. Verify lead length requirements against the specified 25°C/W thermal resistance data.

Part Context

This component belongs to the JEDEC registered 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The 'C' suffix specifically denotes the tighter ±2% voltage tolerance compared to standard B (±5%) or A (±10%) variants. The 'TR8' suffix indicates the specific tape and reel packaging format used for automated assembly processes.

Replacement Considerations

Direct substitutes include other 1N5355 variants with different tolerances such as 1N5355B (±5%) or 1N5355D (±1%). Cross-reference with equivalent 5-watt Zener diodes from other manufacturers ensuring identical voltage, power, and package specifications.