1N5346E3/TR12

Overview

The Microchip Technology 1N5346E3/TR12 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, manufactured by the Microsemi Scottsdale Division. It provides voltage regulation at a nominal Zener voltage of 9.1 V 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 2.0 Ohms and a maximum reverse current of 7.5 µA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and offers flexible axial-lead mounting terminals
• Features void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• RoHS compliant devices available with e3 suffix

Applications

• Voltage regulation in power supply circuits
• Reference voltage sources for electronic systems
• Protection against voltage spikes and transients

Procurement Notes

Verify the specific suffix letters on the part number to confirm voltage tolerance and screening levels. Ensure the component matches the required JEDEC registration and RoHS compliance status. Confirm that the T-18 axial lead package dimensions are compatible with the intended PCB layout and mounting requirements before procurement.

Selection Notes

Select this component based on the required 9.1 V Zener voltage and 5 W power dissipation capability. Consider the ±5% tolerance if precise voltage regulation is needed without tighter specifications. Evaluate thermal management needs, as steady-state power dissipation depends on heat sinking and ambient temperature conditions.

Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series offers a wide selection of voltages from 3.3 V to 200 V with various tolerance options identified by suffix letters. These devices are designed for applications requiring robust voltage regulation and high surge current handling capabilities.

Replacement Considerations

Equivalent parts within the 1N5333-5388B series may be considered if they match the 9.1 V specification and 5 W power rating. Verify that any substitute maintains the same T-18 package and electrical characteristics, including dynamic impedance and reverse current limits.