The 55091-0474 from Molex is a 0.635mm pitch dual row, SlimStack header. This header is made of copper alloy material with gold material plating and tin terminal plating. It mates with SlimStack receptacle 52760, 52837, 52885 and 52901.
Vertical orientation
40 circuits (loaded), PCB retention, PCB locator & no breakaway
Maximum durability of 50 mating cycles
Robotic placement metal cap
Surface mount termination interface style
Operating temperature range from -55°C to +85°C
Maximum 0.5A current per contact, maximum 100V voltage