1N5343C/TR12

Single Zener Diodes Overview

The Microchip Technology 1N5343C/TR12 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, manufactured by Microsemi. It provides voltage regulation at a nominal Zener voltage of 7.5 V with a tight ±2% 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 maximum dynamic impedance of 1.5 Ohms and a maximum reverse current of 10 µA.

Single Zener Diodes 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 for secure installation
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B without requiring dry pack

Single Zener Diodes Applications

• Voltage regulation in power supply circuits
• Reference voltage sources for electronic systems
• Overvoltage protection applications

Single Zener Diodes Procurement Notes

Verify the component origin as this part number originates from the Microsemi Scottsdale Division, which is now part of Microchip Technology. Confirm that the specific suffixes correspond to the required RoHS compliance (e3) and tape and reel packaging (TR). Ensure the procurement channel supports legacy Microsemi product lines and verify the exact moisture sensitivity level requirements for your assembly process.

Single Zener Diodes Selection Notes

Select this component when a precise 7.5 V reference with tight ±2% tolerance is required in a 5-watt power dissipation environment. The C suffix indicates the tighter tolerance compared to standard B or A suffix variants. Consider the thermal resistance of 25°C/W junction-to-lead and ensure adequate heat sinking if operating near the maximum steady-state power limits.

Single Zener Diodes Part Context

This device belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series covers a wide voltage selection from 3.3 V to 200 V. The 1N5343 designation specifically identifies the 7.5 V variant within this extensive family of plastic encapsulated, axial-leaded regulators designed for robust industrial and commercial applications.

Single Zener Diodes Replacement Considerations

Compatible substitutes within the same series include the 1N5343B (±5% tolerance) and 1N5343D (±1% tolerance). Surface mount equivalents are available as SMBJ5343B or SMBG5343B. Verify that any replacement maintains the required 5-watt power rating and T-18 package dimensions.