1N5349A/TR8

Overview

The Microchip Technology 1N5349A/TR8 is a silicon 5-watt Zener diode with a nominal voltage of 12 V and ±10% tolerance. It operates within a temperature range of -65°C to +150°C, featuring a maximum reverse current of 2.0 µA at 8.6 V and a dynamic impedance of 2.5 Ω. The device utilizes an axial-lead T-18 package and supports tape-and-reel packaging.

Feature Summary

• Provides stable voltage regulation across broad operating currents and temperatures
• Withstands high surge stresses without damage
• Features flexible axial-lead mounting terminals for through-hole applications
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in measurement systems

Procurement Notes

Verify the specific suffix 'TR8' indicates tape-and-reel packaging configuration. Confirm RoHS compliance status as standard variants may differ from e3 versions. Ensure the manufacturer designation aligns with current Microchip or legacy Microsemi documentation standards before finalizing procurement orders.

Selection Notes

Select this component when a 12 V reference with moderate precision is required in high-power environments. The 5 W dissipation rating allows operation at higher currents compared to lower-power equivalents. Verify thermal management requirements based on the specified junction-to-lead thermal resistance for reliable long-term performance.

Part Context

This part belongs to the JEDEC registered 1N5333B through 1N5388B series of 5-watt silicon Zener diodes. The series offers a wide voltage selection from 3.3 V to 200 V with various tolerance options identified by suffix letters. These devices are designed for robust industrial applications requiring high surge capability.

Replacement Considerations

Equivalent parts include other 12 V 5 W Zener diodes from the same series such as 1N5349B (±5% tolerance) or 1N5349C (±2% tolerance). Cross-reference with generic 1N5349 specifications if exact suffix variations are unavailable.