1N5343B

Single Zener Diodes Overview

The Microsemi Corporation 1N5343B is a silicon 5.0-watt Zener diode with a nominal voltage of 7.5 V and a ±5% tolerance. It operates within a temperature range of -65°C to +150°C. Key electrical parameters include a maximum dynamic impedance of 1.5 Ω, a maximum reverse current of 10 µA at 5.4 V, and a maximum regulator current of 630 mA. The device features a T-18 axial lead package.

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 versatile installation

Single Zener Diodes Applications

• Voltage regulation circuits requiring 5W power dissipation
• Overvoltage protection for industrial equipment
• Power supply filtering and stabilization

Single Zener Diodes Procurement Notes

Verify the specific suffix (e.g., TR for tape and reel) against project requirements. Confirm RoHS compliance status if environmental regulations apply, as standard versions may differ from e3 variants. Ensure adequate heat sinking is designed into the PCB layout to support the 5W power rating and maintain thermal resistance specifications.

Single Zener Diodes Selection Notes

Select this component when a 7.5V reference or clamp is needed with high power handling capabilities. Consider the T-18 package dimensions for board space constraints. Evaluate thermal management needs carefully, as steady-state power dissipation drops significantly when mounted on FR4 boards compared to direct lead heating.

Single Zener Diodes Part Context

This part belongs to the JEDEC registered 1N5333B through 1N5388B series of axial-leaded 5.0 watt Zener diodes. The series covers a wide voltage selection from 3.3 to 200 volts. The 'B' suffix specifically denotes a standard voltage tolerance of plus or minus 5%. These plastic encapsulated devices are designed for applications requiring robust performance under high DC currents.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N5343BG from onsemi and the 1N5343B-TP from Micro Commercial Components. Verify that substitute manufacturers meet the same T-18 package outline and electrical characteristics.