The Aetek AET-SD-301 is an EPoC surge protection device which is used to prevent signal/power path from damage of surge impulse. This design is fit for EPoC application. Additionally, the operation indicator will turn on while protector being out of life. The AET-SD-301 is a hardened-graded surge protector, operating between -40 degrees to 85 degrees and plug-and-play surge protectors defending the surge up to 6KV. It is typically deployed beside the EPoC RX device.