STMicroelectronics

SMBJ48A-TR

SMBJ48A-TR Description

The SMBJ48A-TR from STMicroelectronics is a unidirectional Zener-type TVS diode designed for general-purpose transient voltage suppression in electronic circuits. It features a 48V reverse standoff voltage (Typ) and a minimum breakdown voltage of 53.3V, ensuring robust protection against voltage spikes. With a peak pulse current rating of 8.1A (10/1000µs) and a maximum clamping voltage of 77.4V @ Ipp, it effectively safeguards sensitive components from transient overvoltage events. Packaged in a surface-mount SMB (DO-214AA) form factor and supplied in Tape & Reel (TR), it is optimized for automated assembly processes.

SMBJ48A-TR Features

• High Power Handling: 600W peak pulse power dissipation for reliable surge protection.
• Low Clamping Voltage: 77.4V max clamping ensures minimal stress on downstream components.
• Fast Response Time: Rapid reaction to transient events, typical of TVS diodes.
• Robust Construction: ROHS3 compliant and REACH unaffected, meeting environmental regulations.
• Wide Operating Range: Suitable for 48V systems with a tight breakdown tolerance (53.3V min).
• Automation-Friendly: MSL 1 (Unlimited) moisture sensitivity allows extended floor life.

SMBJ48A-TR Applications

• Industrial Electronics: Protects PLCs, motor drives, and control systems from voltage transients.
• Telecom Equipment: Safeguards 48V power lines and communication interfaces.
• Automotive Systems: Used in 12V/24V/48V automotive networks for ESD and load-dump protection.
• Power Supplies: Shields DC-DC converters and switching regulators from inductive spikes.
• Consumer Electronics: Ideal for USB ports, HDMI lines, and other high-speed interfaces.

Conclusion of SMBJ48A-TR

The SMBJ48A-TR stands out for its high power dissipation, precise voltage clamping, and reliability in harsh environments. Its surface-mount design and compliance with industry standards make it a versatile choice for transient protection across industrial, automotive, and telecom applications. Engineers can leverage its optimized performance-to-size ratio to enhance system robustness without compromising board space.