1857884-1 is a 4-position inverted modular jack designed for cable-to-board connectivity in PCB applications. This RJ22 connector features a single port configuration with vertical PCB mount orientation and standard latch-down design. The contacts are constructed from phosphor bronze with nickel underplating and gold or gold flash over palladium nickel plating in the mating area, supporting a maximum current rating of 1.5 A. The housing is made of PA 4.6 material in black color with a 1.02 mm pitch and operates within a temperature range of -40°C to 70°C. This surface mount connector is reflow solder capable to 260°C and meets Cat 3 performance standards with UL94V-0 flammability rating, making it suitable for telecommunications and signal applications.