The NC4MBH is 4 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount The NC4MBH has rated voltage of < 50 V and rated current per contact of 6 A and dielectric strength of 1,5 kVdc . Same as A series with exception of a metal mounting flange featuring continuous circumferential ground contact to chassis for best EMC practice.