SMA6J33A 400W TVS Diode SMA/DO-214AC | 33V Transient Voltage Suppression for ESD & Surge Protection | RUILON

RUILON

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The SMA6J33A from RUILON is a high-reliability 400W Transient Voltage Suppressor (TVS) diode designed to protect sensitive electronic circuits from voltage transients, electrostatic discharge (ESD), and surge events. Built in a compact SMA (DO-214AC) package, it offers an optimal balance between power handling capability and board space efficiency, making it ideal for modern high-density PCB designs.

With a working reverse standoff voltage of 33V, the SMA6J33A provides precise clamping performance, ensuring stable protection for low- to medium-voltage power and signal lines. Its fast response time in the picosecond range allows it to react instantly to transient spikes, significantly reducing the risk of damage to downstream components.

The device features a peak pulse power dissipation of 400W (10/1000 µs waveform), delivering strong surge absorption capability while maintaining excellent thermal stability. Compared to lower power TVS series, the SMA6J33A offers improved robustness, higher energy handling, and better long-term reliability under repeated surge conditions.

This component is widely used in automotive electronics, industrial control systems, communication interfaces, power supplies, and consumer electronics. Its rugged construction, low leakage current, and high surge endurance make it a dependable solution for protecting sensitive semiconductor devices in harsh electrical environments. 

Key Features

  • 400W peak pulse power dissipation (10/1000 µs waveform) for strong surge absorption capability
  • 33V reverse standoff voltage for stable protection of low/medium voltage circuits
  • Ultra-fast response time for instant clamping of ESD and transient voltage spikes
  • Low leakage current ensures minimal power loss during normal operation
  • High surge capability improves reliability under repetitive transient events
  • Excellent clamping performance protects sensitive ICs and semiconductor devices
  • Compact SMA (DO-214AC) surface-mount package for efficient PCB layout and high-density designs
  • Robust silicon avalanche technology for long-term stability and durability

Applications

  • Automotive electronics protection (ECU, infotainment, sensors)
  • Industrial automation and control systems
  • Power supply line transient voltage protection
  • Communication interfaces (RS-485, RS-232, Ethernet ports)
  • Consumer electronics (set-top boxes, routers, smart devices)
  • LED lighting and driver circuits
  • Portable and battery-powered electronic devices
  • ESD protection for I/O ports and signal lines