1N5348E3/TR12

Overview

The Microchip Technology 1N5348E3/TR12 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333B-1N5388B series. It provides voltage regulation at a nominal Zener voltage of 11 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. Key electrical parameters include a maximum reverse current of 5.0 µA, a dynamic impedance of 2.5 Ω, and a maximum regulator current of 8.0 A.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Features flexible axial-lead mounting terminals for through-hole installation
• Moisture classification Level 1 requiring no dry pack

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, now part of Microchip Technology. Confirm RoHS compliance via the e3 suffix and tape & reel packaging via the TR12 suffix. Ensure the specific lot matches the required screening level, as military equivalents require distinct prefix identifiers not present in this standard commercial designation.

Selection Notes

Select this component when a 5-watt power dissipation rating is required for high-current applications. The 11 V nominal voltage and ±5% tolerance suit general-purpose regulation tasks. Consider the thermal resistance characteristics and derating curves if operating near the maximum junction temperature limits or utilizing FR4 PCB mounting configurations.

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 1N5348 variant specifically targets the 11 V regulation point within this lineup, sharing common mechanical and thermal properties with its siblings in the plastic encapsulated T-18 case.

Replacement Considerations

Compatible substitutes within the same series include 1N5348B (standard) or 1N5348A (±10% tolerance). Surface mount equivalents are available as SMBJ5348B or SMBG5348B. Verify that any replacement maintains the required 5 W power rating and T-18 package dimensions for direct interchangeability.