The 903-499J-51P2 is an SMB jack PC mount connector designed for high-frequency RF applications. It features a 50 ohm impedance and operates across a frequency range of DC to 4 GHz, with a dielectric withstanding voltage of 1000 VRMS minimum. The connector is constructed with a zinc diecast body and brass contacts, both gold-plated, and uses a PTFE insulator for reliable performance. It offers mechanical durability of 500 cycles minimum and operates reliably across a temperature range of -65°C to +165°C. This connector is ideal for RF and microwave applications requiring robust, high-frequency signal transmission in PCB-mounted configurations.