96-Position Backplane Header, Guide Left Orientation
The TE Connectivity 2057737-1 is a 96-position header from the Impact series, arranged in 6 rows of 16 columns. This is the guide-left variant, meaning the alignment key sits on the left side when viewed from the mating face — a detail that matters when you're populating a backplane with multiple headers and need to prevent a 180° mis-mate. The black colour is consistent across the Impact series, so a mixed-vendor backplane panel keeps a uniform appearance.
If your system sees repeated card swaps during test or field upgrade, this is the plating grade that keeps contact resistance stable.
The guide-left keying ensures the header only accepts a receptacle with the matching guide rib — a simple mechanical safeguard against forcing a misaligned card into the slot. Termination is through-hole solder, which gives a stronger mechanical anchor than SMT for a 96-position connector that sees insertion forces from a full card cage.