Not only does Amphenol offer Magnetic Modular Jacks with PoE, they also offer built-in surge protection inside the connector. Based on the IEC 61000 standard, the chip is useful for protection against very fast and often damaging voltage spikes. These voltage spikes or surges can be caused by lightning and electrostatic discharge (ESD). Notice the line-to-line and line-to-ground surge components illustrated in the pin diagram of the connector.