1N5345B/TR12

Single Zener Diodes Overview

The Microchip Technology 1N5345B/TR12 is a silicon 5-watt Zener diode in the JEDEC registered 1N5333-5388B series. It provides voltage regulation at a nominal Zener voltage of 9.1 V with a ±5% tolerance. 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 test current of 150 mA, a maximum dynamic impedance of 2.0 Ohms, and a maximum reverse leakage current of 7.5 µA. The component is supplied in tape and reel packaging.

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 changes 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
• Power supply protection
• Reference voltage generation

Single Zener Diodes Procurement Notes

Verify the manufacturer origin as the datasheet identifies Microsemi Scottsdale Division. Confirm RoHS compliance status via the e3 suffix if required. Ensure the TR12 designation matches the specific tape and reel configuration needed for automated assembly processes.

Single Zener Diodes Selection Notes

Select this component for applications requiring 5-watt power dissipation and precise 9.1 V regulation. Consider the thermal resistance of 25°C/W junction-to-lead when designing heat sinking solutions. Verify that the ±5% tolerance aligns with circuit requirements compared to tighter tolerance options available in the series.

Single Zener Diodes Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series offers a wide selection of voltages from 3.3V to 200V. The B suffix specifically denotes a standard voltage tolerance of plus or minus 5%. The series is JEDEC registered and designed for high DC currents with adequate heat sinking.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available as SMBJ5333 to SMBJ5388B or SMBG5333B to SMBG5388B.