{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"221543-2","brand":"TE Connectivity AMP Connectors","brandSlug":"te-connectivity-amp-connectors","productSlug":"221543-2","canonicalUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/221543-2","factsUrl":"https://icsourcedirect.com/api/mcp/products/221543-2","rawCanonicalId":null},"summary":{"shortDescription":"TE Connectivity BNC T-Adapter, Style T-Shape, Plug to Dual Jack, 50 Ohms, Free Hanging, Bayonet Lock, Gold Center Contacts, Bulk.","salesMarkdown":"## 50-Ohm BNC T-Adapter for In-Line Signal Splitting The TE Connectivity 221543-2 is a BNC-to-BNC T-adapter that converts a single male plug input into two female jack outputs, all within a 50 Ohm impedance path. The T-shape body lets you tee off a coaxial signal line without an extra junction box — common for routing a test signal to two instruments or splitting a reference clock in a lab rack. Center contacts are gold-plated over beryllium copper and brass, keeping contact resistance low through repeated connect-disconnect cycles in field or bench use. ## Impedance and Signal Path — 50 Ohm, Not 75 This adapter is built for 50 Ohm systems — the impedance is fixed by the PTFE dielectric and the centre-conductor geometry. It will pass a 75 Ohm signal with degraded return loss and a mismatch at every interface, so stick to 50 Ohm coax (RG-58, RG-213, LMR-195) for the intended performance. The centre gender runs female-to-male through the adapter: the male pin on the plug end connects to the female sockets on the two jack ends, so the signal path stays continuous without gender changers. ## Build and Materials — Brass Body, Gold Contacts, PTFE Dielectric Inside, the PTFE dielectric holds the centre conductor in place and maintains the 50 Ohm characteristic impedance across the operating band. Centre contacts are beryllium copper (plug pin) and brass (jack sockets), both gold-plated. Gold on the mating surfaces handles repeated bayonet engagements without oxidation buildup — important for test equipment that sees daily reconnections. ## Mounting and Mechanical — Free Hanging, Bayonet Lock Both Ends This is a free-hanging (in-line) adapter with no panel-mount flange or PCB footprint — it floats in the cable run. Both the plug and the two jack ends use bayonet-style locking: a quarter-turn engages the coupling nut, and the slot-and-pin interface holds the pair together against vibration and cable tug. The T-shape means the two jack ports sit 90° off the main axis, so the adapter forms a Y in the cable path; plan for the branch to clear adjacent connectors in a dense panel layout.","metaTitle":"TE Connectivity 221543-2 BNC T-Adapter, 50 Ohm, Active","metaDescription":"TE Connectivity 221543-2 BNC T-adapter, 50 Ohm impedance, T-shape, plug to dual jacks, bayonet lock, gold contacts. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"TE Connectivity AMP Connectors","Style":"T-Shape","Series":"-","Package":"Bulk","Features":"-","Includes":"-","Impedance":"50 Ohms","Body Finish":"Nickel","Adapter Type":"Plug to Jack","Body Material":"Brass","Center Gender":"Female to Male","Mating Cycles":"-","Mounting Type":"Free Hanging (In-Line)","Adapter Series":"BNC to BNC, Dual","Fastening Type":"Bayonet Lock, Bayonet Lock","Insertion Loss":"-","Product Status":"Active","Conversion Type":"Same Series","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Base Product Number":"221543","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-","Center Contact Plating":"Gold","Center Contact Material":"Beryllium Copper; Brass","Convert To (Adapter End)":"BNC Jack, Female Socket (2)","Convert From (Adapter End)":"BNC Plug, Male Pin"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$66.6100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/10650e43ffff60ea8b97e16ee276a3ef.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the body material of 221543-2?","answer":"The body is machined brass with a nickel finish. Brass provides good RF shielding and mechanical strength, while the nickel plating adds corrosion resistance and a consistent conductive surface for the shield path."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/221543-2","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/te-connectivity-amp-connectors/221543-2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:52:26.615Z","lastPublished":"2026-08-11T15:52:26.615Z","indexable":true}}