{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"31-203","brand":"Amphenol","brandSlug":"amphenol","productSlug":"31-203","canonicalUrl":"https://icsourcedirect.com/amphenol/31-203","factsUrl":"https://icsourcedirect.com/api/mcp/products/31-203","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC jack, 31-203, 50 Ohm, 1 port, panel mount flange, solder cup termination, silver-plated beryllium copper center contact, nickel-plated brass body, extended insulation, 500 mating cycles, 4 GHz max, -65°C to 165°C.","salesMarkdown":"## 50 Ohm BNC Jack for Panel-Mount RF Runs The PTFE dielectric keeps insertion loss to 0.2 dB across the band. ## Termination and Mounting: Solder Cup to the Cable, Flange to the Panel Termination is solder cup — tin the centre conductor, flow solder into the cup, and dress the braid to the nickel-plated brass body. Panel mounting uses the flange with clearance holes for #4 screws; the bayonet lock secures the mating plug with a quarter-turn. ## How the 31-203 Compares to the 31-206 The closest functional peer is the 31-206, also a 50 Ohm BNC jack with the same 4 GHz ceiling, 500 mating cycles, and 500 V rating. The 31-206 uses a clamp-style shield termination and ships as a 7-piece kit (connector, braid clamp, clamp, contact, gasket, lockwasher, nut) for bulkhead mounting with a front-side nut. The 31-203 is a simpler solder-cup, flange-mount part with no included hardware — choose the 31-206 when you need a captive-nut bulkhead install and clamp-on braid termination; choose the 31-203 when the panel has pre-tapped holes and you prefer a direct solder joint on the shield.","metaTitle":"Amphenol RF 31-203 BNC Jack, 50 Ohm, 4 GHz, Solder Cup","metaDescription":"Amphenol RF 31-203 BNC jack, 50 Ohm, 4 GHz max, 500 mating cycles. Panel mount with extended insulation. Active production, sourced to order. Request quote.","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":"Silver","Center Contact Material":"Beryllium Copper"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.4900","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/251f26ee46c7c1ddeca481e2baa91bbc.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/31-203/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the Amphenol RF 31-203?","answer":"The 31-203 is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — stock levels 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/31-203","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 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}}