1N5349/TR8

Overview

The Microchip Technology 1N5349/TR8 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation at a nominal Zener voltage of 12 volts with a ±5% tolerance, indicated by the B suffix. The device operates within a temperature range of -65°C to +150°C and features a T-18 axial lead package. Electrical characteristics include a maximum dynamic impedance of 2.5 ohms and a maximum reverse current of 125 microamperes.

Feature Summary

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

Applications

• Voltage regulation circuits requiring 5-watt power dissipation
• High current applications with adequate heat sinking
• General purpose protection against voltage spikes

Procurement Notes

Verify the specific ordering suffix to confirm the exact voltage tolerance and compliance status. The TR8 suffix indicates tape and reel packaging per EIA-296 standards. Confirm that the component meets all required environmental and screening specifications for your application before procurement.

Selection Notes

Select this component when a 12-volt reference with ±5% tolerance is required. Ensure the design accommodates the 5-watt power dissipation rating and utilizes appropriate thermal management. Verify that the axial lead configuration fits the intended PCB layout constraints.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi Scottsdale Division. The series offers a wide selection of voltages from 3.3 to 200 volts with various tolerance options identified by specific suffix letters.

Replacement Considerations

Compatible substitutes include other 1N5349 variants with matching electrical ratings. Cross-reference with equivalent parts from other manufacturers ensuring identical voltage, power, and package specifications.