The 903-285P-51S is a 50 Ohm SMB plug connector intended for crimp termination with various coaxial cables, including RG-174, RG-188, and RG-316/U. It operates efficiently over a frequency range from DC to 4 GHz with a maximum VSWR of 1.3. Constructed with a gold-plated brass body and a gold-plated beryllium copper contact pin, this connector offers high durability rated for a minimum of 500 mating cycles. The use of a PTFE insulator allows it to withstand a wide operating temperature range of -40°C to +155°C and a dielectric voltage of at least 1000 VRMS. Assembly involves soldering the center conductor and crimping the ferrule with a .128" hex tool, ensuring a secure and reliable connection for RF applications.