TDK Epcos B722 20mm Varistor, 184J, 320V AC

The TDK Epcos B722 StandarD series metal oxide varistor (MOV) is a high-performance component designed for reliable circuit protection. Featuring a round, radial-leaded design with a flame-retardant epoxy resin coating, it provides a robust defence against damaging voltage transients. With a wide operating voltage range, it is suitable for numerous industrial and safety applications where maintaining optimal circuit conditions is critical. Its voltage-dependent characteristics allow it to act as a compensation or control element, clamping excessive transient voltages to safe levels.

A key specification is its high surge current rating of up to 8kA, coupled with a peak energy rating of 184J, ensuring it can absorb significant electrical spikes. The varistor operates reliably across a broad temperature range from -40°C to +85°C and is backed by an endurance rating of 1000 hours at 85°C. It offers precise voltage tolerance options of ±10% and ±5%, providing flexibility for different design requirements.

Certifications and Standards

This component meets rigorous international safety and quality standards, including approvals from UL, CSA, VDE, and IEC. It also complies with CQC standards (S05/07, S10/S14, S20) and carries a UL94V-0 flame-retardant rating, confirming its suitability for use in safety-conscious environments.

Technical Specifications

• Voltage Rating (AC): 320V
• Voltage Rating (DC): 420V
• Max Clamping Voltage (Vc): 840V
• Case Style: 20mm Disc
• Component Type: Metal Oxide Varistor (MOV)
• Peak Surge Current (8/20µs): 8kA
• Peak Energy (10/1000µS): 184J
• Operating Temperature: -40°C to +85°C
• Coating: Flame-retardant epoxy resin (UL94V-0)

The TDK Epcos B722 varistor is an essential component for engineers seeking dependable over-voltage protection, combining high surge handling, international certifications, and long-​