The SMAJ440A TVS Diode from RUILON is a high-reliability 400W transient voltage suppressor engineered to protect sensitive electronic circuits from voltage spikes, lightning surges, and electrostatic discharge (ESD). With a 440V stand-off voltage, this device is specifically designed for high-voltage applications, offering superior protection margins compared to lower-voltage TVS diodes while minimizing the risk of false triggering during normal operation. Built using advanced silicon avalanche technology, it ensures ultra-fast response time, low leakage current, and precise clamping performance, enabling effective suppression of transient overvoltage events.
Designed for harsh operating environments, the SMAJ440A delivers excellent thermal stability and high peak pulse current capability under 8/20µs surge conditions, ensuring consistent protection even under repeated surge exposure. Its strong surge absorption capability enhances system reliability and extends the lifespan of connected components.
Encased in the industry-standard SMA (DO-214AC) surface-mount package, this diode supports compact PCB layouts and automated assembly processes, making it ideal for modern electronics requiring both high performance and space efficiency. Its robust construction ensures dependable operation across a wide range of applications.
The SMAJ440A is widely used in power supplies, industrial control systems, telecommunications infrastructure, automotive electronics, and consumer devices, providing reliable protection against high-energy transient voltage threats. It is an excellent choice for engineers seeking compact, efficient, and high-performance surge protection solutions.
Key Specifications:
- Part Number: SMAJ440A
- Peak Pulse Power Dissipation: 400W (8/20µs)
- Stand-off Voltage (VRWM): 440V
- Breakdown Voltage: ~489V – 542V
- Clamping Voltage: ~713V
- Response Time: Picoseconds
- Leakage Current: Low
- Package: SMA / DO-214AC
- Type: Unidirectional TVS Diode
Applications:
- Power supply surge protection
- Industrial control equipment
- Telecommunications systems
- Automotive electronics
- Consumer electronics
Key Features:
- 400W peak pulse power capability
- Ultra-fast transient response
- Low leakage current for improved efficiency
- Accurate and stable clamping performance
- High thermal stability and long-term reliability
- Compact SMA package for space-saving PCB layouts
- Suitable for high-voltage protection applications
