{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"31-218-RFX","brand":"Amphenol","brandSlug":"amphenol","productSlug":"31-218-RFX","canonicalUrl":"https://icsourcedirect.com/amphenol/31-218-RFX","factsUrl":"https://icsourcedirect.com/api/mcp/products/31-218-RFX","rawCanonicalId":null},"summary":{"shortDescription":"BNC to BNC adapter, Straight, Plug to Plug, Male to Male, 50 Ohm, 4 GHz, 500 mating cycles, Free Hanging, Bulk.","salesMarkdown":"## What This BNC Adapter Does The 31-218-RFX is a straight BNC to BNC adapter, male pin on both ends, designed to join two BNC cables or a cable to a bulkhead connector in a 50 Ohm system. It's a pass-through barrel — no impedance transformation, no signal conditioning — just a solid, repeatable RF interconnect for test benches, instrumentation racks, and lab setups where you need to extend a coax run or adapt between male connectors. The nickel-plated brass body and gold-plated centre contacts handle the signal path, with a polyoxymethylene (POM) acetal dielectric keeping the 50 Ohm impedance consistent through the joint. The 4 GHz frequency ceiling means this adapter stays usable well into the UHF and low microwave bands, covering Wi-Fi (2.4 GHz), cellular (up to 2.7 GHz), and most spectrum analyser inputs. If you're working with 75 Ohm video or CATV gear, the sibling 031-218-75RFX (same mechanicals, 75 Ohm impedance) is the one to grab — the centre pin diameter differs, so mixing impedances will cause a reflection at the junction. After that, the centre pin may start to show wear, but for most lab and field applications, that's years of service.","metaTitle":"31-218-RFX BNC to BNC Adapter, 50 Ohm, 4 GHz, Male to Male","metaDescription":"31-218-RFX BNC male-to-male adapter, 50 Ohm impedance, 4 GHz max frequency, 500 mating cycles. Active production, sourced to order.","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":"50Ohm","Body Finish":"Nickel","Adapter Type":"Plug to Plug","Body Material":"Brass","Center Gender":"Male to Male","Mating Cycles":"500","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":"31-218","Dielectric Material":"Polyoxymethylene (POM) Acetal","Operating Temperature":"-40°C~85°C","Center Contact Plating":"Gold","Center Contact Material":"Brass","Convert To (Adapter End)":"BNC Plug, Male Pin","Convert From (Adapter End)":"BNC Plug, Male Pin"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.9000","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/31-218-RFX/alternatives.json"},"ai":{"faq":[{"question":"What is the impedance of 31-218-RFX?","answer":"The 31-218-RFX is a 50 Ohm BNC adapter, matching the standard impedance for most RF test and telecom equipment."},{"question":"Is 31-218-RFX a male or female adapter?","answer":"It is a male-to-male adapter — both ends have a male pin, so it connects two female BNC jacks together."},{"question":"What is the difference between 31-218-RFX and other BNC adapters?","answer":"The key difference is the 50 Ohm impedance and gold-plated centre contacts. The sibling 031-218-75RFX is a 75 Ohm version for video/CATV; the peer 31-218 has silver-plated contacts instead of gold."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/31-218-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/31-218-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}}