TDK offers varistors in SMD design with high surge current capability

TDK Corporation presents two new varistor series in SMD design. The types of both series are available for a wide range of operating voltages from 175VRMS to 460VRMS, corresponding to 225VDC to 615VDC. While the B72210M series of surge devices, which are equivalent to S14 leaded disk varistors, offers a surge current capability of 6000A, the B72214M series types, which are equivalent to S20 leaded disk varistors, have a high surge current capability of 10,000A. All types are designed for a high operating temperature of a maximum of +125°C and extremely damp heat environment (85% relative humidity at +85°C).

The new SMD high surge series is qualified to AEC-Q200. In terms of designs, all types are available in a horizontal as well as vertical version, which offers higher design flexibility. The horizontal version of the B72210M series has dimensions of 22x15x11mm, while the B72214M series has dimensions of 27x18x11mm. The vertical types have dimensions of 15x10x20mm and 18x10x25.5mm, respectively. This results in space saving compared to leaded varistors with the same performance.

Typical applications of SMD surge protection components are on-board chargers, power supplies, frequency converters, photovoltaic systems and household appliances (more info).