SMBJ40A-AT 600W 40V TVS Diode SMBJ-AT | RUILON

The SMBJ40A-AT is a 600W transient voltage suppressor (TVS) diode designed to protect sensitive electronic circuits from ESD, lightning surges, and fast transient voltage spikes. With a 40V standoff voltage, it provides stable operation and reliable clamping performance for mid-voltage power rails and signal line protection applications.

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

The 40V rating offers enhanced voltage tolerance, making it suitable for modern electronic systems requiring higher protection thresholds and wide operating margins across industrial, telecom, and consumer applications.

Key Features

• 600W peak pulse power capability
• 40V standoff voltage for higher operating margin
• Fast response to ESD and surge transients
• Low leakage current for energy-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 and transient protection
• Industrial automation systems
• Telecom and networking equipment
• Consumer electronics protection
• Data and signal line ESD protection
• LED lighting and driver circuits
• Automotive low-voltage electronic systems