1N5351B

Overview

The Microsemi Corporation 1N5351B is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, housed in an axial-lead T-18 package. It provides a nominal voltage regulation of 14V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum reverse current of 1.0 µA at a test voltage of 10.1V. Electrical characteristics include a dynamic impedance of 2.5 ohms and a maximum regulator current of 10.6A when adequately heat sunk.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals for versatile circuit integration
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

• Voltage regulation circuits for microcontrollers and sensors
• Overvoltage protection for power supply inputs
• High reliability military and aerospace applications using screened prefixes

Procurement Notes

Verify that the specific part number matches the required suffix (e.g., 'B' for ±5% tolerance) as indicated on the datasheet. Confirm RoHS compliance status by checking for the 'e3' suffix if lead-free components are required. Ensure the procurement documentation references the correct manufacturer specifications for thermal derating and maximum ratings.

Selection Notes

Select this component for applications requiring 5W power dissipation and precise voltage clamping. Consider the thermal resistance of 25°C/W junction-to-lead when designing heat sinking solutions. Verify that the operating current remains within the specified maximum regulator current limits to ensure long-term stability and prevent thermal runaway.

Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a wide voltage selection from 3.3V to 200V, utilizing plastic encapsulated bodies that meet UL94V-0 standards. These devices are designed for robust performance in demanding electronic environments.

Replacement Considerations

Equivalent parts may be found within the same JEDEC registered series or from other manufacturers producing Surmetic 40 style regulators. Verify that replacement components match the 5W power rating, 14V Zener voltage, and ±5% tolerance requirements.