1N5355CE3/TR12

Overview

The Microchip Technology 1N5355CE3/TR12 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation at a nominal Zener voltage of 18 V with a tight tolerance of ±2%. The device operates in a through-hole T-18 axial package and supports a maximum power dissipation of 5 watts at 25°C. Electrical characteristics include a test current of 65 mA, a maximum dynamic impedance of 2.5 ohms, and a maximum reverse leakage current of 0.5 µA. It withstands operating temperatures from -65°C to +150°C.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for standard through-hole integration
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B without requiring dry pack

Applications

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

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm RoHS compliance status via the e3 suffix documentation. Ensure storage conditions adhere to Level 1 moisture sensitivity requirements. Validate thermal management capabilities based on specific circuit heat sinking configurations before final procurement.

Selection Notes

Select this component when precise voltage regulation is required within a 5-watt power envelope. The ±2% tolerance makes it suitable for applications demanding tighter accuracy than standard B-suffix devices. Verify that the T-18 package dimensions fit the target PCB layout and that the lead length accommodates the required thermal resistance calculations for the specific mounting environment.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes originally developed by Microsemi's Scottsdale Division. The series offers a wide selection of voltages from 3.3V to 200V. The 'e3' suffix indicates RoHS-compliant annealed matte-tin plating, while the 'TR' suffix denotes tape and reel packaging options for automated assembly processes.

Replacement Considerations

Consult the manufacturer's discontinuation notices for valid substitute part numbers. Verify that any replacement maintains the same 5-watt power rating, 18V Zener voltage, and ±2% tolerance. Ensure mechanical compatibility with the T-18 axial package and confirm electrical parameters meet or exceed the original specifications.