1N5347B

Overview

The onsemi 1N5347B is a silicon-oxide passivated junction Zener diode rated for 5 watts of steady-state power dissipation. It provides a nominal reverse Zener voltage of 10 V with a ±5% tolerance, operating at a test current of 125 mA. The device features a maximum dynamic impedance of 2 Ω and a maximum leakage current of 5 µA at 7.6 V. It utilizes an axial lead Surmetic 40 package (Case 017AA) and supports a maximum DC regulator current of 475 mA.

Feature Summary

• Utilizes silicon-oxide passivated junctions to ensure tight electrical limits and superior operating characteristics.
• Features high surge capability with ratings up to 180 W for non-repetitive pulses lasting 8.3 ms.
• Offers robust environmental protection through a void-free, transfer-molded thermosetting plastic case.
• Provides enhanced electrostatic discharge resilience with a Human Body Model rating exceeding 16 kV.

Applications

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

Procurement Notes

Verify the specific ordering suffix when purchasing. The 'G' suffix indicates availability in Pb-Free packages. Confirm whether the required unit quantity corresponds to box packaging or tape and reel specifications based on the selected variant. Ensure compliance with RoHS directives if lead-free construction is mandatory for the assembly process.

Selection Notes

Select this component for applications requiring precise 10 V regulation within a 5 W power envelope. The ±5% tolerance suits general-purpose designs where strict precision is not critical. Consider the thermal resistance characteristics and derating requirements above 25°C ambient temperature to maintain safe junction temperatures during continuous operation.

Part Context

This part belongs to the 1N53 Series, a comprehensive family of 5 Watt Zener diodes manufactured by onsemi. The series spans a wide voltage range from 3.3 V to 200 V, utilizing standardized JEDEC type numbers. The 1N5347B specifically addresses the 10 V segment of this lineup, sharing common mechanical and electrical design principles with adjacent voltage variants.

Replacement Considerations

Cross-reference with other manufacturers offering the standard 1N5347B designation. Verify that substitute parts match the 5 W power rating, 10 V nominal voltage, and ±5% tolerance. Ensure the replacement device accommodates the same axial lead configuration and thermal management requirements.