1N5346/TR12

Single Zener Diodes Overview

The Microchip Technology 1N5346/TR12 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. 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 in an axial T-18 package and supports tape-and-reel packaging via the 'TR' suffix. Electrical characteristics include a test current of 150 mA, a maximum dynamic impedance of 2.0 Ohms, and a maximum reverse leakage current of 7.5 µA. It withstands a maximum regulator current of 6.6 A and features a thermal resistance of 25 °C/W junction-to-lead.

Single Zener Diodes 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
• Moisture classification Level 1 requiring no dry pack storage

Single Zener Diodes Applications

• Voltage regulation circuits requiring 5-watt power dissipation
• High current applications with adequate heat sinking
• Surge protection environments

Single Zener Diodes Procurement Notes

Verify the specific ordering suffixes to confirm RoHS compliance (e3) and tape-and-reel packaging (TR). Confirm that the component matches the original Microsemi/now Microchip specifications. Check for any product change notifications or discontinuance alerts associated with this part number before finalizing procurement plans.

Single Zener Diodes Selection Notes

Select this component when a 9.1 V reference with ±5% tolerance is required. Ensure the application can accommodate the 5-watt power rating and provide sufficient heat sinking to maintain operation within the -65°C to +150°C temperature range. Verify that the axial lead form factor fits the mechanical constraints of the design.

Single Zener Diodes Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes originally manufactured by Microsemi Scottsdale Division. The series covers a wide voltage selection from 3.3 to 200 volts. The 1N5346 variant specifically targets the 9-volt regulation segment within this high-power axial-leaded family.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering 5W axial Zener diodes at 9.1V ±5%. Verify pinout compatibility and thermal resistance values. Ensure equivalent surge current handling capabilities are met.