{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"031-5559-RFX","brand":"Amphenol","brandSlug":"amphenol","productSlug":"031-5559-RFX","canonicalUrl":"https://icsourcedirect.com/amphenol/031-5559-RFX","factsUrl":"https://icsourcedirect.com/api/mcp/products/031-5559-RFX","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC plug, male pin, 50 Ohm, 4 GHz, 500 V, bayonet lock, crimp termination for RG-58 cable, 500 mating cycles, bulk pack includes ferrule.","salesMarkdown":"## BNC Plug for RG-58 — 50 Ohm, 4 GHz, Crimp Termination The 031-5559-RFX: The kit ships as two pieces — the connector body and a crimp ferrule — so the buyer gets everything needed for one termination in a single order code. ## Cable Fit and Termination — What Cable Does It Work With? This plug is dimensioned for RG-58 plenum, 122, Belden 88240, and 89907 cable groups — the most common 50 Ohm thin coax types used in low-loss indoor runs and patch cords. The shield is crimped via the included ferrule; the centre contact uses a push-on termination, which means no solder pot to fill. For a harness builder, this is a clean, repeatable crimp process — as long as the cable jacket OD falls within the ferrule range for RG-58, the assembly is straightforward. ## Construction and RF Performance The body is zinc die cast with a nickel finish — standard for BNC where corrosion resistance in indoor environments is sufficient. The centre pin is brass with gold plating, which keeps contact resistance low over the 500-cycle life. Dielectric is polyoxymethylene (POM) acetal, a stable material for the 50 Ohm impedance match up to 4 GHz. Insertion loss is specified at 0.2 dB, which is typical for a well-made BNC interface at these frequencies.","metaTitle":"Amphenol RF 031-5559-RFX BNC Plug, 50 Ohm, 4 GHz, RG-58","metaDescription":"Amphenol RF 031-5559-RFX BNC plug, male pin, 50 Ohm, 4 GHz max, 500 V, 500 mating cycles. Crimp termination for RG-58 cable.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Amphenol RF","Series":"-","Package":"Bulk","Features":"-","Includes":"2 pcs - 1 Connector, 1 Ferrule","Impedance":"50Ohm","Body Finish":"Nickel","Cable Group":"RG-58 Plenum, 122, Belden 88240, 89907","Body Material":"Zinc Die Cast","Housing Color":"Silver","Mating Cycles":"500","Mounting Type":"Free Hanging (In-Line)","Connector Type":"Plug, Male Pin","Fastening Type":"Bayonet Lock","Insertion Loss":"0.2dB","Product Status":"Active","Voltage Rating":"500 V","Connector Style":"BNC","Frequency - Max":"4 GHz","Number of Ports":"1","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Shield Termination":"Crimp","Base Product Number":"031-55","Contact Termination":"Push On","Dielectric Material":"Polyoxymethylene (POM) Acetal","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Gold","Center Contact Material":"Brass"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.7672","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/ad670945486664bd83e9cd2d39458d5d.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/031-5559-RFX/alternatives.json"},"ai":{"faq":[{"question":"Is 031-5559-RFX 50 ohm?","answer":"Yes, the impedance is 50 Ohm, and the connector is rated to 4 GHz maximum frequency."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/031-5559-RFX","citationPolicyUrl":"https://icsourcedirect.com/llms.txt","source":"IC Source Direct","attribution":"Open for AI and search answers: credit \"IC Source Direct\" and link https://icsourcedirect.com/amphenol/031-5559-RFX when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-23T20:41:44.623Z","lastPublished":"2026-07-23T20:41:44.623Z","indexable":true}}