1N5358/TR8

Overview

The Microsemi 1N5358/TR8 is a silicon 5-watt Zener diode with a nominal voltage of 22V and ±5% tolerance. It features a maximum dynamic impedance of 3.5 ohms at a test current of 50mA, with a maximum reverse leakage current of 0.5µA at 15.8V. The device supports a maximum regulator current of 4.7A and withstands surge currents up to 216A. Packaged in an axial-lead configuration with a TR suffix for tape and reel delivery, it operates within a temperature range of -65°C to +150°C and offers low thermal resistance for high DC current applications.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses while maintaining minimal voltage changes versus current
• Features flexible axial-lead mounting terminals for versatile integration
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 5-watt power dissipation
• High current applications with adequate heat sinking
• Surge protection environments demanding robustness against transient stresses

Procurement Notes

Verify the specific ordering suffix 'TR' confirms tape and reel packaging rather than bulk or tube formats. Confirm RoHS compliance status if required by assembly specifications, as indicated by potential 'e3' suffixes in related part numbers. Ensure the supplier provides documentation matching the JEDEC registered series data for electrical characteristics. Validate that the component meets the specified moisture classification level without requiring dry pack handling procedures.

Selection Notes

Select this component when a 22V Zener reference with 5-watt capability is needed. The ±5% tolerance suits general regulation tasks where tighter precision is unnecessary. Consider the axial lead form factor for through-hole mounting requirements. Evaluate thermal management needs, as steady-state power dissipation depends on lead temperature or ambient conditions on FR4 boards. Compare dynamic impedance values against circuit sensitivity requirements for noise performance.

Part Context

This part belongs to the 1N5333B thru 1N5388B series of JEDEC registered silicon Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers voltages from 3.3V to 200V in a 5-watt plastic encapsulated package. The 'TR' suffix denotes a tape and reel option compliant with EIA-296 standards, facilitating automated surface mount or through-hole placement processes.

Replacement Considerations

Surface mount equivalents are available as SMBJ5358B or SMBG5358B. Verify pinout compatibility and thermal performance differences between axial leads and surface mount packages before substitution.