Coaxial Switch Receptacle with Internal Switch — 4mm Plug Diameter
The Hirose MS-156HF(20) is a coaxial switch receptacle from the MS-156HF series, designed as a female socket with a snap-on fastening type. Its defining feature is the integrated internal switch, which allows signal routing changes without an external relay — the switch opens or closes as the mating plug is inserted or removed. The connector style is specified as a coaxial switch with a 4mm plug diameter, meaning it mates with a 4mm-diameter plug (not a standard SMA or BNC). This is a single-port, surface-mount device with a gold-finished phosphor bronze body and a beryllium copper center contact plated in gold.
50 Ohm impedance, 6 GHz max frequency, 0.15 dB insertion loss.
The dielectric material is polyamide (nylon 6T), which handles the temperature range and provides stable RF performance.
