SMBJ140A-AT 600W 140V TVS Diode SMBJ-AT | RUILON

The SMBJ140A-AT is a 600W transient voltage suppressor (TVS) diode designed to protect electronic circuits from electrostatic discharge (ESD), lightning-induced surges, and fast transient voltage spikes. With a 140V standoff voltage, it provides reliable overvoltage clamping while maintaining stable operation for higher-voltage power and signal line applications.

Housed in a compact SMB (DO-214AA) surface-mount package, it is optimized for high-density PCB designs and automated assembly processes. The device features ultra-fast response time, ensuring immediate suppression of transient events to protect ICs, communication interfaces, and control electronics. Its low leakage current helps reduce power loss during normal operation, while the glass-passivated junction structure ensures strong long-term reliability and thermal stability in harsh electrical environments.

The 140V rating offers enhanced voltage tolerance, making it suitable for modern electronic systems that require robust surge protection with wide operating margins across industrial, telecom, and consumer electronics applications.

Key Features

• 600W peak pulse power capability
• 140V standoff voltage for higher voltage systems
• Fast response to ESD and surge transients
• Low leakage current for efficient operation
• High surge absorption (8/20 µs waveform)
• SMB (DO-214AA) compact SMD package
• Glass-passivated junction for high reliability
• Bidirectional protection design

Applications

• Power supply surge protection
• Industrial automation systems
• Telecom and networking equipment
• Consumer electronics protection
• Data and signal line ESD protection
• LED lighting and driver circuits
• Automotive and industrial electronic systems