TDK EPCOS Metal Oxide Varistor (MOV), 74J 130V AC, 8kA

The TDK EPCOS B722 StandarD series varistor is a robust, radial-leaded metal oxide varistor (MOV) designed for transient voltage protection in a wide array of electronic circuits. Featuring a round shape and epoxy resin coating, these components offer reliable performance and a broad operating voltage range from 11V RMS to 1100V RMS, making them highly versatile for both control and protection applications. Their voltage-dependent characteristics allow them to act as a variable resistor, providing optimal operating conditions in normal use and swiftly clamping excessive transient voltage spikes to safeguard sensitive downstream components.

A key specification of this model is its high peak surge current rating of 8kA (8/20µs) and a peak energy rating of 74 joules (10/1000µs), offering substantial protection against high-energy electrical surges. This makes it an excellent choice for industrial and safety-critical applications where equipment must withstand unpredictable power anomalies. The component is constructed with flame-retardant materials, achieving a UL94V-0 rating for enhanced safety in the event of a fault.

This varistor is designed for long-term reliability, featuring an operating temperature range from -40°C to +85°C and an endurance rating of 1000 hours at 85°C. It comes with a varistor voltage tolerance of ±10% or ±5%, ensuring consistent performance. Furthermore, it holds approvals from major international safety standards bodies including UL, CSA, VDE, CQC, and IEC, providing assurance of its quality and safety for global markets.

With a clamping voltage (Vc max) of 340V and ratings of 130V AC / 170V DC, this TDK EPCOS varistor is a fundamental component for designing resilient power supplies, motor drives, and industrial control systems, effectively mitigating the risks posed by lightning strikes, inductive load switching, and other voltage transients.