5-6123212-1 is a fine pitch SMT stacking receptacle connector designed for parallel board-to-board applications. This 40-position connector features a 0.8mm pitch and 30µ" gold plating on the contact area for reliable electrical connections. The receptacle supports stacking heights of 13mm, 14mm, 15mm, and 16mm when mated with compatible plugs. Key dimensions include A: 15.20mm, B: 21.80mm, and C: 20.20mm. The connector is rated for 100 VAC, 0.5 ampere current, and operates within a temperature range of -40°C to +85°C. It is RoHS compliant and ideal for high-density interconnect applications requiring reliable board-to-board connections.