1N5349AE3/TR8

Overview

The Microchip Technology 1N5349AE3/TR8 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation with a nominal Zener voltage of 12 V and a tolerance of ±10%. The device operates within a temperature range of -65°C to +150°C and features a T-18-2 axial lead package. Electrical characteristics include a maximum dynamic impedance of 2.5 Ohms at a test current of 100 mA, a maximum reverse leakage current of 125 µA, and a maximum regulator current of 7.5 A.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals for through-hole applications
• Non-sensitive to electrostatic discharge (ESD) 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 component origin as this part number originates from the Microsemi Scottsdale Division, which is now part of Microchip Technology. Confirm that the 'e3' suffix indicates RoHS compliance and the 'TR8' suffix specifies tape and reel packaging per EIA-296 standards. Ensure the specific lot date code aligns with project requirements given the historical nature of the datasheet provided.

Selection Notes

Select this component when a 5-watt power dissipation rating is required for axial-leaded Zener applications. The ±10% tolerance makes it suitable for general-purpose regulation where tight precision is not critical. Consider the thermal resistance of 25°C/W junction-to-lead for heat sinking calculations. Verify that the 12 V breakdown voltage matches the circuit design constraints before integration.

Part Context

This device belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series offers a wide selection of voltages from 3.3 V to 200 V. The 'A' suffix denotes a standard ±10% voltage tolerance, while the 'e3' suffix confirms lead-free construction. These plastic encapsulated devices are moisture classification Level 1 and do not require dry packing.

Replacement Considerations

Compatible replacements within the same series include other 1N53xx variants with matching voltage ratings. Surface mount equivalents such as SMBJ5349 or SMBG5349 may be used if footprint adaptation is permitted. Cross-reference with military screened versions like JAN1N5349A if higher reliability screening is required.