1N5346B/TR12

Overview

The Microchip Technology 1N5346B/TR12 is a silicon 5-watt Zener diode with a nominal voltage of 9.1 V and ±5% tolerance. It operates within a temperature range of -65°C to +150°C, featuring a maximum reverse current of 7.5 µA at 6.9 V and a dynamic impedance of 2.0 Ω. The device utilizes a T-18 axial lead package and includes a 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 offers minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals suitable for through-hole applications

Applications

• Voltage regulation circuits requiring 5W power dissipation
• Overvoltage protection for industrial equipment
• Power supply input transient suppression

Procurement Notes

Verify the specific manufacturer origin, as Microsemi was acquired by Microchip Technology. Confirm RoHS compliance status via the e3 suffix if required. Ensure the TR12 designation matches the intended tape and reel specifications for automated assembly processes.

Selection Notes

Select this component when a 9.1V reference with 5W capability is needed. Consider thermal derating curves for ambient temperatures above 25°C. Verify that the T-18 package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the JEDEC registered 1N5333B through 1N5388B series of 5-watt Zener diodes. The series covers voltages from 3.3V to 200V. The 'B' suffix indicates a standard ±5% voltage tolerance.

Replacement Considerations

Equivalent parts include Diotec Semiconductor 1N5346B and MCC 1N5346B-TP.