The 5558178-1 is a 8P8C 1-port Cat3 shielded surface mount RJ45 Modular Jack with panel stops and PCB ground options and side entry. It meets 1000V dielectric requirement contact to contact and designed for direct mounting on pc boards. It has phosphor bronze plated with gold in contact area and tin-lead on solder tails over nickel under-plate contacts, polyester, polyphenylene sulphide or high temperature nylon material and finish housing.