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.
Mating and Termination
This header mates with the corresponding Impact receptacle (the right-angle or vertical version, depending on your backplane layout). 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.