1N5357/TR8

Overview

The Microchip Technology 1N5357/TR8 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation with a nominal Zener voltage of 20V and a ±5% tolerance, indicated by the 'B' suffix. The device operates in an axial lead T-18 package and supports a wide temperature range from -65°C to +150°C. Electrical characteristics include a maximum reverse current of 0.5 µA at 14.4V and a dynamic impedance of 3.0 ohms.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Features flexible axial-lead mounting terminals for through-hole integration
• Constructed with a void-free transfer molded thermosetting epoxy body

Applications

• Voltage regulation circuits requiring 5W power dissipation
• High surge stress environments
• Applications utilizing flexible axial-lead mounting

Procurement Notes

Verify the component origin carefully as the datasheet identifies Microsemi Scottsdale Division as the manufacturer, while the model is attributed to Microchip Technology. Confirm that the TR8 suffix corresponds to the tape and reel packaging option described in the documentation. Ensure the specific B suffix matches the required ±5% voltage tolerance before procurement.

Selection Notes

Select this component when a 20V regulation point is required within the 3.3V to 200V selection range. The 5W power rating necessitates adequate heat sinking or adherence to derating curves for ambient temperatures above 25°C. Verify compatibility with the T-18 axial lead package dimensions and ensure the operating environment falls within the specified -65°C to +150°C thermal limits.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series offers various voltage options and tolerances identified by suffix letters. Surface mount equivalents are available in SMBJ and SMBG packages. Military screening options exist via specific prefixes, though standard commercial versions utilize the base numbering scheme.

Replacement Considerations

Surface mount equivalents such as SMBJ5357B or SMBG5357B are available within the same product family.