40D471K Metal Oxide Varistor – 40D Series | RUILON

The RUILON 40D Series Metal Oxide Varistors are ultra-high surge energy protection components designed for demanding industrial and power distribution systems. With a large disc diameter and enhanced energy absorption capability, they provide superior protection against lightning surges, switching transients, and high-energy overvoltage events.

The 40D series delivers excellent clamping stability, high surge current handling, and long operational life, making it suitable for critical infrastructure and heavy-duty electrical environments.

✅ Key Features

• Extremely high surge energy absorption capability
• Excellent protection against lightning and switching surges
• Stable and reliable clamping voltage performance
• Designed for heavy-duty industrial applications
• High endurance against repetitive surge stress
• Long service life with robust disc construction

📌 Applications

• Power transmission and distribution systems
• Industrial surge protection devices (SPD)
• Heavy machinery and automation systems
• High-power inverters and converters
• Utility and infrastructure protection systems
• Large-scale electrical installations
• Telecom and base station power protection