SMDJ40A-AT 3000W 40V TVS Diode SMDJ-AT | RUILON

The SMDJ40A-AT is a 3000W transient voltage suppressor (TVS) diode designed to provide high-performance protection against electrostatic discharge (ESD), lightning surges, and fast transient voltage spikes. With a 40V standoff voltage, it delivers accurate and stable overvoltage clamping for low- to mid-voltage power rails and signal line applications.

Encapsulated in the SMC (DO-214AB) surface-mount package, the SMDJ-AT series offers superior surge handling capability compared to SMBJ and SMCJ families, making it suitable for circuits exposed to high-energy transient events. The device features ultra-fast response time, ensuring immediate suppression of voltage spikes to protect ICs, communication interfaces, and control electronics. Its low leakage current improves system efficiency, while the glass-passivated junction structure ensures excellent long-term reliability and thermal stability under harsh operating conditions.

The 40V rating provides a balanced protection threshold with strong operating margin, making it ideal for modern electronic systems requiring robust and efficient surge protection performance.

Key Features

• 3000W peak pulse power capability
• 40V standoff voltage for stable circuit protection
• Ultra-fast response to ESD and surge transients
• Low leakage current for efficient operation
• High surge absorption (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