onsemi

1SMB5920BT3

1SMB5920BT3 Description

The 1SMB5920BT3 is a 6.2V Zener diode from onsemi, designed for surface-mount (SMB) applications requiring precise voltage regulation and transient suppression. With a 3W power dissipation rating, this diode offers robust performance in compact form factors. It features a ±5% tolerance on its nominal Zener voltage (Vz), ensuring stable voltage clamping under varying conditions. The device operates with a low forward voltage (1.5V max @ 200 mA) and exhibits minimal reverse leakage (5 µA @ 4 V), making it efficient for power-sensitive designs. Packaged in Tape & Reel (TR) and rated MSL 1 (Unlimited), it is suitable for automated assembly processes.

1SMB5920BT3 Features

• High Power Handling: 3W max power dissipation for reliable performance in demanding circuits.
• Precision Voltage Regulation: 6.2V nominal Zener voltage with ±5% tolerance ensures consistent clamping accuracy.
• Low Leakage Current: 5 µA @ 4 V reverse leakage minimizes power loss.
• Compact SMB Package: Space-saving surface-mount design ideal for high-density PCBs.
• Robust Construction: 2 Ohms max dynamic impedance (Zzt) for stable operation under load variations.
• Automation-Ready: Tape & Reel packaging and MSL 1 compliance streamline manufacturing.

1SMB5920BT3 Applications

• Voltage Regulation: Used in power supplies and voltage reference circuits to maintain stable output.
• Transient Protection: Protects sensitive ICs from ESD and voltage spikes in consumer electronics and automotive systems.
• Signal Clamping: Ensures signal integrity in communication devices by limiting overvoltage conditions.
• Industrial Controls: Ideal for PLC modules and sensor interfaces requiring precise voltage thresholds.

Conclusion of 1SMB5920BT3

The 1SMB5920BT3 stands out for its high power dissipation, tight voltage tolerance, and low leakage, making it a superior choice for voltage regulation and protection in compact designs. Its SMB package and automation-friendly packaging further enhance its suitability for high-volume production. While marked Obsolete, it remains a reliable option for legacy systems or designs prioritizing proven performance. Engineers should evaluate alternatives for new designs but can leverage this diode’s strengths in existing applications requiring robust voltage control.