1N5357B/TR8

Overview

The Microchip Technology 1N5357B/TR8 is a silicon 5-watt Zener diode with a nominal voltage of 20 V and ±5% tolerance. It operates within a temperature range of -65°C to +150°C, featuring a maximum reverse current of 0.5 µA at 14.4 V and a dynamic impedance of 3 Ω. The device utilizes an axial-lead T-18 package and includes the TR suffix for tape-and-reel packaging.

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 suitable for standard PCB layouts

Applications

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

Procurement Notes

Verify that the part number includes the TR suffix to confirm tape-and-reel packaging compatibility with automated assembly equipment. Ensure the B suffix is present to guarantee the specified ±5% voltage tolerance. Confirm RoHS compliance status if required by environmental regulations.

Selection Notes

Select this component when a 5-watt power dissipation rating is necessary for thermal management. The 20 V nominal voltage aligns with specific regulation requirements. Verify that the axial lead form factor fits the mechanical constraints of the target enclosure or circuit board design.

Part Context

This component belongs to the JEDEC registered 1N5333 through 1N5388B series of silicon Zener diodes manufactured by Microsemi (now Microchip). The series covers a wide voltage range from 3.3 V to 200 V, offering various tolerance options identified by suffix letters such as A, B, C, and D.

Replacement Considerations

Equivalent parts include the 1N5357B without the TR suffix for bulk packaging, or other manufacturers' 1N5357B variants. Verify pinout and thermal resistance specifications match before substitution.