TDK B722 Series Metal Oxide Varistor, 150J 385V ac

The TDK (Epcos) B722 Series comprises robust, round-shaped, radial-leaded SIOV metal oxide varistors (MOVs), designed for reliable circuit protection across a broad spectrum of applications. These components function as voltage-dependent resistors, offering optimal operating conditions and safeguarding sensitive electronics from damaging transient voltage spikes. Their wide operating voltage range, from 11V RMS to 1100V RMS, makes them exceptionally versatile for both control and compensation roles in various circuit designs.

A key feature is the high surge current handling capability, with ratings up to 8kA, ensuring protection against significant electrical disturbances. The devices boast a peak energy rating of 150J, providing substantial absorption capacity for transient energy. Constructed with a flame-retardant epoxy resin coating and rated UL94V-0, they meet stringent safety standards for flammability, enhancing reliability in demanding environments.

Approvals & Reliability

The series carries major international approvals, including UL, CSA, VDE, CQC (S05/07, S10/S14, S20), and IEC certification, guaranteeing compliance with global safety and performance norms. Engineered for endurance, these varistors are tested for 1000 hours at 85°C and operate reliably across a wide temperature range from -40°C to +85°C. Available with a varistor voltage tolerance of ±10% or ±5%, they allow for precise circuit design and consistent performance.

Specifications & Applications

With an AC voltage rating of 385V and a DC rating of 505V, this specific model features a maximum clamping voltage (Vc) of 1.025kV. The disc-style case measures 20mm in diameter. Primarily designed for industrial and safety-critical applications, these TDK varistors are essential components for creating resilient electronic systems that require protection from voltage surges and transient events.