Metal oxide disk varistors work up to 105 °C

TDK Corporation presents leaded EPCOS metal oxide disk varistors, which have now been approved for an increased operating temperature of 105 °C (previously 85 °C). The reason for this is the recertification of the B722* series of varistors in accordance with UL 1449, 4th Edition, and IEC 61051. Raising the permissible operating temperature to 105 °C also changes the climate category from 40/85/56 to 40/105/56. The flammability of the epoxy enclosure complies with UL 94 V-0.

The monolithic EPCOS varistors are available with rated voltages of between 11 VRMS and 1100 VRMS and, depending on type, can withstand surge currents of up to 20 kA (8/20 µs). To assist in the design process, PSpice libraries are available under www.epcos.com/tools_mlv.

The varistors are well suited for the protection of power supply and converter inputs for industrial electronics applications, as well as household appliances and telecommunication devices.

 

Main applications

• Power supplies and converters for industrial electronics applications, as well as household appliances and telecommunication devices.

Main features and benefits

• Increased permissible operating temperature of 105 °C
• Wide range of rated voltages from 11 V_RMS to 1100 V_RMS
• High surge current capability of up to 20 kA (8/20 µs)