TDK Epcos B722 Standard Series Varistor, 47J 300V AC

The TDK Epcos B722 Standard Series are round, radial leaded metal oxide varistors (MOVs) designed for robust transient voltage protection. These components feature a wide operating voltage range, making them versatile for numerous electronic applications where safeguarding sensitive circuits is critical. Their voltage-dependent characteristics allow them to act as a variable resistor, providing a high-impedance path under normal conditions and rapidly switching to a low-impedance state during voltage spikes, thereby clamping excessive transients.

Constructed with a flame-retardant epoxy resin coating and rated UL94V-0, these varistors offer excellent safety and durability. They are built to endure harsh conditions, with an operating temperature range from -40°C to +85°C and a proven endurance of 1000 hours at 85°C. This model delivers a peak energy absorption of 47 joules and can handle surge currents up to 2.5kA, providing reliable protection against electrical disturbances.

Key Specifications & Features

• High Surge Protection: Capable of suppressing transient voltage spikes with a peak surge current rating of 2.5kA (8/20µs).
• Robust Construction: Epoxy resin coated and UL94V-0 rated for flame retardancy, ensuring safety and longevity.
• Wide Operating Range: Functions reliably across a broad temperature spectrum from -40°C to 85°C.
• International Approvals: Certified to relevant safety and performance standards including UL, CSA, VDE, CQC, and IEC.
• Precise Tolerances: Available with a varistor voltage tolerance of ±5% or ±10% for design flexibility.

These varistors serve as essential control or compensation elements in circuits, either to optimise operating conditions or to provide a defensive barrier against damaging voltage transients, ensuring the longevity and reliability of your electronic equipment.