{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"31-2221","brand":"Amphenol","brandSlug":"amphenol","productSlug":"31-2221","canonicalUrl":"https://icsourcedirect.com/amphenol/31-2221","factsUrl":"https://icsourcedirect.com/api/mcp/products/31-2221","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC jack, female socket, 50 Ohm, 4 GHz, 500 V, panel mount bulkhead, solder cup, silver-plated contacts, PTFE dielectric, extended insulation, Bulk.","salesMarkdown":"## 50 Ohm BNC Jack with Extended Insulation — What This Connector Is The 31-2221: It is the extended-insulation variant of the standard 31-2211, meaning the dielectric and body are lengthened to provide additional creepage distance between the centre contact and the panel — useful when the connector passes through a grounded chassis and the signal path needs extra voltage standoff. The nickel-plated brass body provides the RF shield ground path through the bulkhead. ## Mechanical and Environmental Rating This makes the 31-2221 a candidate for aerospace instrumentation, environmental chambers, or industrial process control where the connector sees both cold soak and hot-side exposure. ## Termination and Installation The bayonet lock provides quick quarter-turn mating with a standard BNC plug. The extended insulation feature means the rear insulator protrudes further past the mounting face than a standard BNC, so verify panel clearance before specifying — the extra length is intended for thicker panels or where the connector must stand off from the chassis ground. ## How 31-2221 Differs from 31-2211 The 31-2221 is the extended-insulation version of the standard 31-2211. Both are 50 Ohm BNC jacks with the same electrical ratings (4 GHz, 0.2 dB insertion loss, 500 V), same materials (PTFE dielectric, silver-plated centre contact, nickel-plated brass body), and same mounting (bulkhead, rear-side nut). The only difference is the extended rear insulator on the 31-2221, which adds length behind the panel. If your panel thickness is standard (under 3 mm) and you have no high-voltage creepage requirement, the 31-2211 is the direct equivalent; if you need the extra standoff or are working with a thicker chassis, the 31-2221 is the correct choice.","metaTitle":"31-2221 Amphenol RF BNC Jack, 50 Ohm, 4 GHz, Bulkhead","metaDescription":"31-2221 Amphenol RF BNC jack, female socket, 50 Ohm, 4 GHz max, 0.2 dB insertion loss, 500 mating cycles, silver-plated contacts, PTFE dielectric, panel mount","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Amphenol RF","Series":"-","Package":"Bulk","Features":"Extended Insulation","Includes":"3 pcs - 1 Connector, 1 Lockwasher, 1 Nut","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":"Bulkhead - Rear Side Nut","Ingress Protection":"-","Shield Termination":"Solder","Base Product Number":"31-222","Contact Termination":"Solder Cup","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Silver","Center Contact Material":"Phosphor Bronze"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.0300","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/31-2221/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/31-2221","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/31-2221 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}}