1N5344B/TR12

Single Zener Diodes Overview

The Microchip Technology 1N5344B/TR12 is a silicon 5-watt Zener diode in the JEDEC registered 1N5333-5388B series. It provides voltage regulation at a nominal Zener voltage of 8.7 V with a ±5% tolerance, indicated by the 'B' suffix. 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 test current of 150 mA, a maximum dynamic impedance of 2.0 ohms, and a maximum reverse leakage current of 10 µA at 5.9 V. The part is supplied in tape and reel packaging.

Single Zener Diodes 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 integration
• Moisture classification Level 1 requiring no dry pack storage

Single Zener Diodes Applications

• Voltage regulation circuits
• Surge protection applications
• Reference voltage sources

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin, as this component was originally produced by Microsemi Corporation before its acquisition by Microchip Technology. Confirm that the 'TR12' suffix corresponds to the standard EIA-296 tape and reel packaging format. Ensure compliance with RoHS requirements if applicable, noting that non-e3 versions may contain lead.

Single Zener Diodes Selection Notes

Select this component when a 5-watt power dissipation rating and an 8.7 V regulation point are required. The ±5% tolerance suits general-purpose applications. Consider thermal management, as steady-state power dissipation depends on lead length or PCB copper pad area. Verify that the T-18 package dimensions fit the target mechanical constraints.

Single Zener Diodes Part Context

This part 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 'B' suffix specifically denotes a standard voltage tolerance of plus or minus 5%. These devices are designed for high maximum DC currents with adequate heat sinking due to their low thermal resistance design.

Single Zener Diodes Replacement Considerations

Equivalent parts within the same series include 1N5343B and 1N5345B for adjacent voltage ratings. Cross-reference with other manufacturers offering 5W axial Zener diodes in the T-18 package, ensuring matching electrical parameters such as Zener voltage, tolerance, and power dissipation.