The Hirose MS-156NB(01) is a surface-mount coaxial switch receptacle from the MS-156NB series, designed as a 50 Ohm RF interconnect with an internal switch function. It accepts a 4 mm diameter plug and uses a snap-on fastening for quick mating — typical for antenna switching, RF path selection, or test-point applications where a board-level coaxial connection needs to be broken and remade without tools.
The 100-cycle mating life is moderate for a snap-on connector; in a field-service context, that means the contact surfaces will hold up through several equipment reworks but aren't rated for daily disconnect cycles like a test-port connector would be.
Mounting and Termination — Board-Level Fit
Surface-mount termination with solder shield termination means this part reflows onto the PCB alongside other SMT components. No crimp or field-termination option exists; if the board fails, the whole connector gets replaced.
Obsolete Status — What It Means for Sourcing
The MS-156NB series has no listed direct replacement or successor order code.