1N5338A/TR12

Single Zener Diodes Overview

The Microsemi Corporation 1N5338A/TR12 is a silicon Zener diode with a nominal voltage of 5.1 V and a maximum power dissipation of 5 W. It features a ±10% tolerance, indicated by the 'A' suffix, and operates within a temperature range of -65°C to +150°C. The device utilizes a T-18 axial leaded package and is supplied in tape and reel format per EIA-296 standards. Electrical characteristics include a maximum dynamic impedance of 1.5 Ohms at a test current of 240 mA and a forward voltage of 1.2 V maximum at 1 A.

Single Zener Diodes Feature Summary

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

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify component authenticity against official Microsemi documentation due to end-of-life status. Confirm RoHS compliance requirements as standard versions may not meet current environmental directives. Ensure thermal management design accounts for the specified junction-to-lead thermal resistance when selecting heat sinking solutions for continuous operation.

Single Zener Diodes Selection Notes

Select this component for applications requiring a 5.1 V reference with moderate tolerance. Consider the T-18 package constraints for PCB layout and verify that the operating current remains within the specified limits to maintain regulation accuracy. Evaluate thermal derating curves if ambient temperatures exceed standard conditions or if mounting on FR4 substrates without adequate copper pads.

Single Zener Diodes Part Context

This part belongs to the JEDEC registered 1N5333-5388B series of 5.0 watt Zener diodes. The series offers a wide selection of voltages from 3.3 V to 200 V. The 'TR12' suffix indicates the specific tape and reel packaging configuration, while the 'A' suffix denotes the ±10% voltage tolerance characteristic distinct from other suffixes like B (±5%) or C/D (tighter tolerances).

Single Zener Diodes Replacement Considerations

RoHS-compliant equivalents are available by adding the e3 suffix to the base part number, such as 1N5338A/e3. Surface mount alternatives exist within the SMBJ5333-SMBJ5388B or SMBG5333B-SMBG5388B series.