onsemi

1N5347B

1N5347B Description

The 1N5347B from onsemi is a 10V, 5W Zener diode designed for precision voltage regulation and protection in electronic circuits. Packaged in an axial form factor, it features a ±5% tolerance on its nominal Zener voltage (Vz), ensuring stable performance in demanding environments. With a maximum reverse leakage current of 5 µA @ 7.6 V and a low forward voltage drop of 1.2 V @ 1 A, this diode offers efficient operation while minimizing power dissipation. Its low dynamic impedance (Zzt) of 2 Ohms enhances transient response, making it suitable for high-reliability applications.

1N5347B Features

• High Power Handling: Rated for 5W dissipation, ideal for robust voltage regulation.
• Precision Voltage Reference: 10V nominal Zener voltage with ±5% tolerance for accurate regulation.
• Low Leakage: 5 µA reverse leakage ensures minimal power loss in standby modes.
• Axial Package: Through-hole mounting simplifies assembly in PCB designs.
• Wide Operating Range: Suitable for industrial, automotive, and power supply applications.
• REACH Unaffected: Compliant with environmental regulations, ensuring long-term availability.

1N5347B Applications

• Voltage Regulation: Used in power supplies and voltage stabilizers to maintain consistent output.
• Overvoltage Protection: Safeguards sensitive components in surge suppressors and clamping circuits.
• Reference Voltage Source: Provides stable bias in analog circuits and sensor interfaces.
• Automotive Electronics: Reliable performance in 12V systems for load dump protection.
• Industrial Controls: Ensures precision in motor drives and PLC systems.

Conclusion of 1N5347B

The 1N5347B stands out as a high-power, precision Zener diode with excellent voltage regulation and low leakage characteristics. Its axial package and 5W power rating make it a versatile choice for engineers designing power supplies, protection circuits, and industrial systems. While marked as obsolete, its proven reliability and onsemi’s legacy quality ensure it remains a trusted component in legacy and maintenance-critical designs. For applications demanding stable 10V reference with robust performance, the 1N5347B delivers unmatched value.