5-5179009-4 is a fine pitch SMT stacking receptacle connector designed for parallel board-to-board applications. This 100-position connector features 8µ" gold plating and supports stacking heights of 9mm to 12mm when mated with compatible plugs. It offers a voltage rating of 100 VAC, current rating of 0.5 ampere, and contact resistance of 30 milliohms maximum. The connector operates over a temperature range of -40°C to +85°C and features spring contacts for reliable electrical connection. This RoHS compliant connector is ideal for compact electronic assemblies requiring reliable parallel board-to-board interconnections.