SMBJ78A-AT 600W 78V TVS Diode SMBJ-AT | RUILON

The SMBJ78A-AT is a 600W transient voltage suppressor (TVS) diode designed to protect sensitive electronic circuits from ESD, lightning-induced surges, and fast transient voltage spikes. With an 78V standoff voltage, it delivers reliable clamping performance while maintaining stable operating margin for mid-voltage power and signal line applications.

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

The 78V rating offers higher voltage tolerance, making it suitable for modern electronic systems that require robust surge protection with wider operating margins across industrial, telecom, and consumer electronics applications.

Key Features

• 600W peak pulse power capability
• 78V 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 protection
• Industrial control systems
• Telecom and networking equipment
• Consumer electronics protection
• Data and signal line ESD protection
• LED lighting and driver circuits
• Automotive low-voltage electronic systems