{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"31-70019","brand":"Amphenol","brandSlug":"amphenol","productSlug":"31-70019","canonicalUrl":"https://icsourcedirect.com/amphenol/31-70019","factsUrl":"https://icsourcedirect.com/api/mcp/products/31-70019","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC to BNC adapter, 31-70019, straight, jack-to-jack, 75 Ohm, 4 GHz, free-hanging inline, gold center contacts, nickel-plated brass body.","salesMarkdown":"The Amphenol RF 31-70019 is a straight BNC-to-BNC adapter, jack on both ends — a female-to-female barrel coupler for joining two BNC cables or extending a run. It is a same-series adapter (BNC to BNC), not a cross-series converter, so the interface is consistent end to end. That makes it the right choice for video distribution, CCTV, broadcast video, and other 75 Ohm signal paths where a 50 Ohm barrel would create an impedance mismatch and degrade return loss. Rated to 4 GHz, the adapter covers the full bandwidth of 75 Ohm BNC systems — well past the typical 1-2 GHz ceiling of most video and telecom applications. The gold-plated phosphor bronze center contacts (female on both ends) keep corrosion at bay in repeated mate cycles, and the nickel-plated brass body gives the shell a durable, corrosion-resistant finish. The free-hanging inline mount means no panel flange or bulkhead — this barrel sits in-line on a cable run, secured by the bayonet locks on both ends. ## What the 75 Ohm rating means for your signal path If you are working in 50 Ohm RF test or telecom, this is not the barrel you want — a 75 Ohm adapter in a 50 Ohm line creates a ~25% impedance step that bounces energy back toward the source. The 31-70019 is built for 75 Ohm systems: broadcast video (SDI, HD-SDI), CCTV analog and HD, and any 75 Ohm baseband or RF link where the characteristic impedance is matched end to end. The 4 GHz bandwidth is the practical upper limit for a 75 Ohm BNC interface. Above that, the inherent geometry of the BNC interface (air gap at the dielectric interface) starts to degrade return loss. For standard-definition video or sub-1 GHz CCTV, you have plenty of headroom; for 4K/12G-SDI at 12 GHz, you need a different connector family (HD-BNC or DIN 1.0/2.3). ## Construction and materials — what holds up in the field Both ends use a bayonet lock (the standard BNC twist-and-lock), so the adapter mates and unmates quickly without tools.","metaTitle":"Amphenol RF 31-70019 BNC Female to Female Adapter, 75 Ohm","metaDescription":"Amphenol RF 31-70019 BNC jack-to-jack adapter, 75 Ohm impedance, rated to 4 GHz. Free-hanging inline barrel with gold-plated center contacts.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Amphenol RF","Style":"Straight","Series":"-","Package":"Bulk","Features":"-","Includes":"-","Impedance":"75Ohm","Body Finish":"Nickel","Adapter Type":"Jack to Jack","Body Material":"Brass","Center Gender":"Female to Female","Mating Cycles":"-","Mounting Type":"Free Hanging (In-Line)","Adapter Series":"BNC to BNC","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":"31-700","Dielectric Material":"Polyoxymethylene (POM) Acetal","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Gold","Center Contact Material":"Phosphor Bronze","Convert To (Adapter End)":"BNC Jack, Female Socket","Convert From (Adapter End)":"BNC Jack, Female Socket"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.4300","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/31-70019/alternatives.json"},"ai":{"faq":[{"question":"Does the 31-70019 have a female jack on both ends?","answer":"Yes, both ends are BNC jack, female socket — it is a female-to-female barrel coupler, designed to join two male-terminated BNC cables."},{"question":"Where can I buy the Amphenol RF 31-70019 adapter?","answer":"The 31-70019 is sourced to order through independent distribution. Submit an RFQ for current pricing and availability against your required quantity — stock and lead time are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/31-70019","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/31-70019 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}}