Coaxial Switch Receptacle for 4mm Plug, 50 Ohm, 10 GHz
The Hirose MS-162B is a coaxial switch receptacle, female socket, designed for a 4mm plug diameter. It carries an internal switch that routes the RF signal path when mated or de-mated, making it a switching connector rather than a simple through-line receptacle. The connector is surface-mount (SMT), with shield and contact termination both soldered. The snap-on fastening provides quick mate/de-mate without tools, and the gold body finish on brass gives corrosion resistance. The gold-over-nickel center contact plating supports this cycle life without signal degradation from fretting corrosion.
The base product number is MS-162, and the -B suffix denotes this specific variant with the 4mm plug diameter and 12000-cycle rating. For a functional comparison, the MS-156C shares the same 4mm plug diameter and internal switch but is rated for 100 mating cycles and uses a phosphor bronze body with a nylon 6T dielectric—a lower-cycle-life, lower-cost alternative if the application does not require the 12000-cycle endurance of the MS-162B.
The MS-162B mates with a coaxial plug of 4mm diameter using a snap-on fastening mechanism. The SMT footprint requires a reflow soldering process for both the shield and center contact terminations. The single-port design routes the RF signal through the internal switch, which opens or closes a secondary path depending on mate status—confirm the switching logic in the application circuit before layout.