Tab dimensions and board fit
The 1217539-1 is the 0.250" (6.35mm) tab-width member of TE's Faston quick-disconnect terminal line, a male non-insulated tab with 0.032" (0.81mm) thickness and tin-plated brass construction. It terminates via through-hole solder and mates with standard 0.250" female receptacles; the tin finish suits moderate-cycle applications where cost per connection is the primary driver.
Position within the Faston series
The 1217124-1 and 1217061-1 step down to a 0.187" (4.75mm) tab width at the same thickness, with the 1217061-1 adding a right-angle mounting option.