The 121661-5049 is a Micro MDSM 9-contact pin connector designed for reliable signal and power transmission in compact applications. It features a steel shell with tinned and nickel plating, copper alloy contacts with gold over PdNi finish, and a thermoplastic insulator rated UL94V-0 for flame resistance. The connector supports 500 mating cycles with crimp termination, screw mounting, and operates across a temperature range of -55°C to +125°C with a current rating of 2.5 A at 25°C. With a contact spacing of 1.27 mm and contact resistance of 20 mOhm maximum, this connector is ideal for industrial control systems, instrumentation, and equipment requiring robust, miniaturized interconnections.