1N5355E3/TR13

Overview

The Microchip Technology 1N5355E3/TR13 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation at a nominal Zener voltage of 18V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features an isolated plastic T-18 axial lead package. Electrical characteristics include a maximum dynamic impedance of 2.5 ohms, a maximum reverse current of 0.5 µA, and a maximum regulator current of 5.5 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 integration
• Moisture classification Level 1 requiring no dry pack storage

Applications

• Voltage regulation in power supply circuits
• Reference voltage generation for analog systems
• Overvoltage protection stages

Procurement Notes

Verify that the part number includes the e3 suffix to confirm RoHS compliance and matte tin plating. Ensure the TR13 suffix is present to verify tape and reel packaging rather than cut tape or bulk. Confirm the B suffix indicates the standard ±5% voltage tolerance required for the specific design application.

Selection Notes

Select this component when a 5-watt power dissipation rating is necessary for thermal management. The T-18 package offers low thermal resistance suitable for high DC currents with adequate heat sinking. Verify that the 18V breakdown voltage aligns with the circuit requirements and that the ±5% tolerance meets the precision needs of the application.

Part Context

This component belongs to the 1N5333B through 1N5388B series manufactured by Microsemi Scottsdale Division, now part of Microchip Technology. The series covers a wide selection of voltages from 3.3V to 200V. The 1N5355 variant specifically targets applications requiring an 18V regulation point within the 5-watt power class.

Replacement Considerations

Equivalent parts include the MQ1N5355E3TR for military screening levels. Surface mount equivalents such as SMBJ5355B or SMBG5355B are available for PCB space constraints.