The TDK Group's leaded EPCOS metal oxide chip varistors have now been certified to operate at 105°C, a significant improvement from the previous rating of 85°C. The B722 series of varistors is UL1449 (4th edition) and IEC61051 compliant. As a result of the increased operating temperature, the climate category has been updated from 40/85/56 to 40/105/56. These components are encapsulated in epoxy resin, offering excellent flame resistance that meets the UL94V-0 standard.
EPCOS varistors cover a wide voltage range, from 11VRMS to 1100VRMS, and can handle surge currents of up to 20kA (8/20μs), depending on the specific model. To support customers during the design phase, the company also provides a corresponding PSpice component library for easy integration into circuit simulations.
These varistors are ideal for use as protection devices in power supplies, input circuits, and industrial electronics converters. They are widely used in household appliances, telecommunications equipment, and other applications where reliable overvoltage protection is essential.
**Main Applications**
- Power supply protection in industrial electronics
- Input protection for home appliances
- Surge protection in telecommunications systems
**Key Features and Benefits**
- Operate reliably at temperatures up to 105°C
- Wide voltage range: 11VRMS to 1100VRMS
- High surge current capability: Up to 20kA (8/20μs)
- Excellent thermal stability and long service life
- Compliant with global safety standards like UL1449 and IEC61051
Whether you're designing a high-performance power system or looking for durable protection in consumer electronics, EPCOS varistors offer a reliable and versatile solution. Their advanced design ensures optimal performance under various environmental conditions, making them a top choice for engineers and designers worldwide.

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Jiangsu Hengchi Motor Technology Co., Ltd , https://www.hcemotor.com