SMDJ18A-AT 3000W 18V TVS Diode SMDJ-AT | RUILON

The SMDJ18A-AT is a 3000W transient voltage suppressor (TVS) diode engineered to provide high-performance protection against electrostatic discharge (ESD), lightning surges, and fast transient voltage spikes. With an 18V standoff voltage, it ensures precise overvoltage clamping while maintaining stable operation for low-voltage power rails and signal line applications.

Encapsulated in the SMC (DO-214AB) surface-mount package, the SMDJ-AT series delivers significantly higher surge handling capability compared to SMBJ and SMCJ series, making it ideal for circuits exposed to high-energy transients. The device features ultra-fast response time, enabling immediate suppression of transient events to protect ICs, communication interfaces, and control electronics. Its low leakage current enhances system efficiency, while the glass-passivated junction structure ensures excellent long-term reliability and thermal stability in demanding environments.

The 18V rating provides increased operating margin compared to lower-voltage devices, making it suitable for modern electronic systems requiring robust and efficient surge protection.

Key Features

• 3000W peak pulse power capability
• 18V standoff voltage for enhanced operating margin
• Ultra-fast response to ESD and surge transients
• Low leakage current for efficient operation
• High surge absorption capability (8/20 µs waveform)
• SMC (DO-214AB) high-power SMD package
• Glass-passivated junction for high reliability
• Bidirectional protection design

Applications

• High-power surge protection circuits
• Industrial automation systems
• Telecom and networking equipment
• Power supply protection
• Data and signal line ESD protection
• LED lighting and driver circuits
• Automotive and heavy-duty electronic systems