Description

A BNC Male 4-Hole Flange Solder Connector (17.5 mm Square Flange) is a panel-mount RF plug connector designed to attach directly onto chassis enclosures, equipment walls, or bulkhead plates. It features a male BNC bayonet coupling head on the front, a 17.5 mm × 17.5 mm square flange base with four mounting holes, and a solder terminal (solder cup or pin) at the rear for direct wire or PCB lead attachment. Designation BreakdownBNC: Quick twist-and-lock bayonet coupling interface.M (Male): Male plug interface featuring the internal locking pins and center pin.4 HOLE: 4 mounting holes on the base plate to secure the connector to a panel using screws. SOLDER: Rear solder pin/cup for hand-soldering hookup wires, internal coax conductors, or circuit board leads.17.5 MM: Refers to the standard 17.5 mm square flange flange size ($17.5text{ mm} times 17.5text{ mm}$) used for mechanical mounting alignment.Technical SpecificationsParameterSpecificationConnector GenderMale (Plug)Mounting Style4-Hole Square Flange Mount ($17.5text{ mm} times 17.5text{ mm}$)Rear TerminationSolder Cup / Solder PinImpedance50 $Omega$ (75 $Omega$ variants available)Frequency RangeDC to 4 GHzVSWR$le 1.15$ to $1.20$ (DC to 3 GHz)Max Power RatingUp to 50 WDielectric Withstanding Voltage$ge 1000text{V RMS}$Insulation Resistance$ge 5000text{ M}Omega$Body MaterialNickel- or Tin-plated BrassCenter Pin ContactGold-plated Brass / Phosphor BronzeInsulator MaterialPTFE (Teflon)Key Design & Functional FeaturesFlush Chassis Mounting: The $17.5text{ mm}$ square base plate aligns with standard panel cutout patterns, providing low contact resistance grounding across the chassis wall.Solder Contact Termination: Allows reliable direct soldering of internal wiring, making it ideal for compact enclosure interiors.PTFE (Teflon) Insulation: Heat-resistant dielectric prevents the center pin from shifting during hand soldering.Common ApplicationsRF Equipment Enclosures: Panel-mounted male outputs on transmitters, signal generators, and custom amplifiers.Test & Measurement Gear: Input/output ports on benchtop instruments and laboratory test jigs.Telecommunications & Defense: Shielded cabinet feed-through points for internal coaxial or jumper connections.