signal protection
2.11 POE Power Supply Surge Protection Scheme
Plan Application Background: As POE applications become more widespread, long cables may bring induced surge risks, necessitating that designed products comply with the IEC 61000-4-5 standard.
Plan Advantage: The Solution uses SM15T68CA, which can withstand a clamping voltage of 68V, ensuring stable 48V power supply and appropriate filtering. It guarantees instantaneous voltage control on PCB boards, passing the IEC61000-4-5 surge standard’s level 4 test, 8/20μs, 42Ω, 4kV, ±10 times.
