onsemi

1SMB5918BT3  

Single Zener Diodes

1SMB5918BT3 Description

The 1SMB5918BT3 is a high-performance 5.1V Zener diode from onsemi, designed for surface-mount (SMB) applications. With a 3W power dissipation rating and a tight ±5% tolerance, it ensures reliable voltage regulation in compact designs. The diode features a low reverse leakage current of 5 µA @ 2 V, minimizing power loss, and a forward voltage (Vf) of 1.5 V @ 200 mA, enhancing efficiency. Its low dynamic impedance (Zzt) of 4 Ohms ensures stable operation under varying load conditions. Packaged in Tape & Reel (TR) for automated assembly, it complies with REACH and EAR99 regulations, making it suitable for global markets.

1SMB5918BT3 Features

• Voltage Regulation: Precise 5.1V nominal Zener voltage (Vz) with ±5% tolerance for consistent performance.
• High Power Handling: 3W max power dissipation in a compact SMB package, ideal for space-constrained designs.
• Low Leakage: 5 µA reverse leakage @ 2 V reduces standby power consumption.
• Robust Construction: MSL 1 (Unlimited) moisture sensitivity ensures reliability in humid environments.
• Low Impedance: 4 Ohms max dynamic impedance (Zzt) for improved transient response.
• Automation-Friendly: Tape & Reel (TR) packaging streamlines high-volume production.

1SMB5918BT3 Applications

• Voltage Clamping: Protects sensitive ICs from overvoltage in power supplies, automotive electronics, and industrial controls.
• Voltage Reference: Provides stable bias for ADCs, DACs, and precision circuits.
• Surge Suppression: Safeguards telecom equipment and consumer electronics from ESD and transients.
• Portable Devices: Ideal for battery-powered systems due to low leakage and compact form factor.

Conclusion of 1SMB5918BT3

The 1SMB5918BT3 stands out for its high power density, precision voltage regulation, and rugged SMB packaging, making it a superior choice for modern electronics. Its low impedance and leakage enhance efficiency, while REACH compliance ensures environmental safety. Whether for voltage stabilization, surge protection, or portable devices, this Zener diode delivers reliability and performance in demanding applications. Though marked obsolete, it remains a robust solution for legacy designs or inventory-sensitive projects.

1SMB5918BT3 Documents

Download datasheets and manufacturer documentation for 1SMB5918BT3

Datasheets :

SZ1SMB5915BT3G Datasheet       (SZ1)1SMB59xxBT3(G)      

PCN Obsolescence/ EOL :

Multiple Devices 20/Aug/2008      

HTML Datasheet :

SZ1SMB5915BT3G Datasheet       (SZ1)1SMB59xxBT3(G)      

Environmental Information :

onsemi RoHS