SMB Receptacle for Panel-Feed RF Applications
The TE Connectivity 031-0050-0001 is a Microdot-series SMB-style receptacle, female socket, designed for panel-mount bulkhead installations where a 50 Ohm RF signal path needs to pass through a chassis wall. The threaded fastening type provides vibration-resistant coupling — unusual for standard SMB snap-on interfaces — making this suited for industrial or outdoor telecom enclosures where the connector sees mechanical shock.
The 50 Ohm impedance sets the characteristic impedance for the RF signal path — match this to your cable and PCB trace impedance to avoid reflections. The 750 V voltage rating is high for an SMB-class connector; the PTFE dielectric provides the creepage and clearance to support that rating, which matters if you are running a bias voltage on the centre conductor or working in higher-voltage RF systems. The panel-mount bulkhead feature with solder shield termination gives a direct chassis ground path — the shield current returns through the solder joint to the bulkhead, not through a separate ground wire.
Contact termination is solder — the centre pin and shield are soldered to the cable or PCB, not crimped. Shield termination is also solder, meaning the outer braid or foil is soldered to the receptacle body. The threaded fastening type means the mating plug screws on rather than snap-engaging — check that your mating half also has threads, not the standard SMB snap-on interface.
RoHS compliance is not explicitly stated in the available data — confirm with the manufacturer or a compliance search before specifying for RoHS-restricted assemblies.
Comparison with Peer 1057230-1
The TE 1057230-1 is an OSP-style jack with snap-on fastening, stainless steel body, gold finish, and 22 GHz frequency rating — versus the 031-0050-0001's SMB-style with threaded fastening, brass body, silver finish, and 750 V rating. The 1057230-1 is specified for RG-405 (.085" semi-rigid) cable groups, while the 031-0050-0001 does not list a cable group. Both share 50 Ohm impedance and solder termination. If your application needs snap-on mating and higher frequency range, the 1057230-1 is the closer fit; if you need threaded coupling for vibration resistance and a higher voltage rating, the 031-0050-0001 is the correct choice.