{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"31-208-RFX","brand":"Amphenol","brandSlug":"amphenol","productSlug":"31-208-RFX","canonicalUrl":"https://icsourcedirect.com/amphenol/31-208-RFX","factsUrl":"https://icsourcedirect.com/api/mcp/products/31-208-RFX","rawCanonicalId":null},"summary":{"shortDescription":"BNC to BNC T-adapter, 50 Ohm, 4 GHz, T-Shape, Plug to Dual Jack, Gold Center Contacts, Nickel Body, Bulk.","salesMarkdown":"## T-adapter for splitting a BNC line — 50 Ohm, 4 GHz ceiling The 31-208-RFX is a BNC to BNC T-adapter from the Dual BNC series, converting a single BNC plug input into two BNC jack outputs. It's a same-series adapter — no impedance or connector-family conversion — so it simply tee's off a 50 Ohm signal path. The T-shape body hangs free on the cable, with a bayonet lock on each of the three ports. Rated to 4 GHz, it covers the full BNC band through most of L-band and into S-band lower edge. The body is nickel-plated brass and zinc, with a POM acetal dielectric. ## Gold vs silver — the real difference from the base 31-208 The 31-208-RFX and the base 31-208 are form-fit-function identical in every dimension and RF spec — same T-shape, same 50 Ohm impedance, same 4 GHz ceiling, same nickel body finish. The one meaningful difference is the center contact plating: the RFX uses gold, the 31-208 uses silver. Gold gives better corrosion resistance in humid or outdoor environments and maintains consistent contact resistance over the full 500-cycle life. Silver oxidizes over time, which can raise contact resistance in high-cycle or long-deployed applications. If the adapter lives indoors in a dry rack and cycle count stays low, the 31-208 is a cost-effective alternative. For field-service, outdoor, or high-reliability paths, the RFX's gold contacts are the safer call.","metaTitle":"31-208-RFX BNC T-Adapter, 50 Ohm, 4 GHz, Gold Contacts","metaDescription":"31-208-RFX BNC T-adapter, 50 Ohm, 4 GHz max. Gold-plated center contacts, nickel body. Active production, quoted to order. Buy 31-208-RFX.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Amphenol RF","Style":"T-Shape","Series":"-","Package":"Bulk","Features":"-","Includes":"-","Impedance":"50Ohm","Body Finish":"Nickel","Adapter Type":"Plug to Jack","Body Material":"Brass; Zinc","Center Gender":"Female to Male","Mating Cycles":"500","Mounting Type":"Free Hanging (In-Line)","Adapter Series":"BNC to BNC, Dual","Fastening Type":"Bayonet Lock, Bayonet Lock","Insertion Loss":"-","Product Status":"Active","Conversion Type":"Same Series","Frequency - Max":"4 GHz","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Base Product Number":"31-208","Dielectric Material":"Polyoxymethylene (POM) Acetal","Operating Temperature":"-40°C~85°C","Center Contact Plating":"Gold","Center Contact Material":"Brass; Phosphor Bronze","Convert To (Adapter End)":"BNC Jack, Female Socket (2)","Convert From (Adapter End)":"BNC Plug, Male Pin"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.1100","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/31-208-RFX/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between 31-208 and 31-208-RFX?","answer":"The 31-208-RFX uses gold-plated center contacts; the 31-208 uses silver-plated contacts. All other specs — T-shape, 50 Ohm impedance, 4 GHz frequency ceiling, nickel body finish, 500 mating cycles — are identical between the two."},{"question":"What is the frequency range of 31-208-RFX?","answer":"The 31-208-RFX is rated to 4 GHz maximum, covering the full BNC band through L-band and into the lower S-band."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/31-208-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/31-208-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}}