{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"31-203-RFX","brand":"Amphenol","brandSlug":"amphenol","productSlug":"31-203-RFX","canonicalUrl":"https://icsourcedirect.com/amphenol/31-203-RFX","factsUrl":"https://icsourcedirect.com/api/mcp/products/31-203-RFX","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC jack, female socket, 50 Ohm, panel mount, flange, solder cup, gold center contact, 500 mating cycles, 4 GHz, 500 V, extended insulation, bulk.","salesMarkdown":"The 31-203-RFX: It mounts to a panel via a flange, using the bayonet lock for quick connect and disconnect. Extended insulation on this variant adds creepage distance between the center conductor and the shell, supporting the 500 V rating. ## RF Performance and Bandwidth For test equipment, instrumentation, or RF distribution panels, the 4 GHz ceiling covers most sub-6 GHz applications including cellular, Wi-Fi, and broadcast gear. ## Mechanical Endurance and Field Life ## Comparing the 31-203-RFX with the 31-221-RFX The 31-221-RFX is the closest functional sibling — also a BNC jack, 50 Ohm, 4 GHz, 500 mating cycles, and gold-plated center contact. The difference is in the body material and mounting: the 31-203-RFX uses a brass body with a flange mount, while the 31-221-RFX uses a zinc die-cast body with a bulkhead mount (rear-side nut) and includes a lockwasher, nut, and solder tag in the package. For a panel that accepts a flange, the 31-203-RFX is the direct choice; for a bulkhead hole with a nut, the 31-221-RFX fits.","metaTitle":"Amphenol RF 31-203-RFX BNC Jack, 50 Ohm, 4 GHz, Panel Mount","metaDescription":"Amphenol RF 31-203-RFX BNC jack, female socket, 50 Ohm impedance, 4 GHz max frequency, panel mount with flange, solder cup termination, gold-plated center","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors","RF Cable Assemblies"],"specifications":{"Mfr":"Amphenol RF","Series":"-","Package":"Bulk","Features":"Extended Insulation","Includes":"-","Impedance":"50Ohm","Body Finish":"Nickel","Cable Group":"-","Body Material":"Brass","Housing Color":"Silver","Mating Cycles":"500","Mounting Type":"Panel Mount","Connector Type":"Jack, Female Socket","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":"Flange","Ingress Protection":"-","Shield Termination":"Solder","Base Product Number":"31-203","Contact Termination":"Solder Cup","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Gold","Center Contact Material":"Phosphor Bronze"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.6700","stockQuantity":19,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/87ca9d09dea04b44c81903760f683cd2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the Amphenol RF 31-203-RFX?","answer":"The 31-203-RFX is available to order through independent distribution. Submit an RFQ for current pricing and lead time — availability is confirmed at quote time."},{"question":"Does 31-203-RFX have extended insulation?","answer":"Yes, the 31-203-RFX includes extended insulation, which increases creepage distance between the center conductor and the shell for the 500 V rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/31-203-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/31-203-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}}