What is the Hirose MSS-R-PC-3(40)?
The Hirose MSS-R-PC-3(40) is a 50 Ohm coaxial receptacle from the MSS series, designed as a through-hole, snap-on mating female socket. It uses a PTFE dielectric and gold-plated beryllium copper centre contact, with a gold-plated brass body. Rated for 1 GHz maximum frequency and 3000 mating cycles, it suits RF interconnect in instrumentation, telecom, and test equipment where repeated connect/disconnect is routine.
The 1 GHz frequency ceiling means it handles everything from DC through cellular bands and into lower microwave ranges; above 1 GHz the insertion loss climbs and the VSWR degrades. 3000 mating cycles is high for a coaxial connector — the gold-on-beryllium copper centre contact and snap-on retention are built for field-service and test-bench duty where the cable gets swapped regularly.
Sourcing and lifecycle — Last Buy status
The MSS-R-PC-3(40) carries a Last Buy lifecycle status. That means Hirose has announced end-of-life; the final production window is open, and once stock is exhausted this part will not be remanufactured. There is no official successor order code on record for this receptacle. If you need a drop-in alternative, check the MSS series for other 50 Ohm receptacles with the same snap-on interface and through-hole footprint; no pin-compatible substitute is listed in the official record.