{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"31-2","brand":"Amphenol","brandSlug":"amphenol","productSlug":"31-2","canonicalUrl":"https://icsourcedirect.com/amphenol/31-2","factsUrl":"https://icsourcedirect.com/api/mcp/products/31-2","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC series, 31-2, Plug Male Pin, 50Ohm, 4 GHz, 500 V, Solder Termination, Free Hanging, Bayonet Lock, Silver, Bulk.","salesMarkdown":"The 31-2: Rated for 500 V and 500 mating cycles, it covers standard test-equipment, instrumentation, and low-power RF interconnects where a solder-on BNC plug is specified. This plug accepts RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, and 9907 cables. The centre contact is solder-terminated; the shield is clamped. The PTFE dielectric keeps insertion loss to 0.2 dB across the band. ## Cross-Reference: 31-206 vs 31-2 The key difference: the 31-206 is a bulkhead-mount (front side nut) jack, not a free-hanging plug. It also includes a lockwasher and nut in the kit and uses a beryllium copper centre contact. If your application requires a bulkhead receptacle rather than an in-line plug, the 31-206 is a functional cross-shop candidate. For a free-hanging male plug replacement, the 31-320-RFX or 31-315-RFX (both active, crimp-terminated, gold-plated contacts) are closer in form factor but differ in termination style and dielectric material.","metaTitle":"Amphenol RF 31-2 BNC Plug, 50 Ohm, 4 GHz, Obsolete","metaDescription":"Amphenol RF 31-2 BNC plug, male pin, 50 Ohm, 4 GHz, 500 V. Free-hanging, solder termination, RG-58 cable group. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["RF / Coaxial Connectors","RF Cable Assemblies"],"specifications":{"Mfr":"Amphenol RF","Series":"-","Package":"Bulk","Features":"-","Includes":"6 pcs - 1 Connector, 1 Braid Clamp, 1 Clamp, 1 Contact, 1 Gasket, 1 Washer","Impedance":"50Ohm","Body Finish":"Nickel","Cable Group":"RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, 9907","Body Material":"Brass","Housing Color":"Silver","Mating Cycles":"500","Mounting Type":"Free Hanging (In-Line)","Connector Type":"Plug, Male Pin","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":"-","Ingress Protection":"-","Shield Termination":"Clamp","Base Product Number":"31-2","Contact Termination":"Solder","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Silver","Center Contact Material":"Brass"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.6900","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/31-2/alternatives.json"},"ai":{"faq":[{"question":"What is the direct replacement for Amphenol RF 31-2?","answer":"There is no official direct replacement from Amphenol RF for the 31-2. The closest active functional cross-reference is the 31-206, but that is a bulkhead jack, not a free-hanging plug. For a free-hanging male plug, consider the 31-320-RFX or 31-315-RFX, which are active but use crimp termination and gold-plated contacts."},{"question":"What cable types does the 31-2 connector work with?","answer":"The 31-2 accepts RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, and 9907 cables."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/31-2","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/31-2 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}}