{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"034-1121-12G","brand":"Amphenol","brandSlug":"amphenol","productSlug":"034-1121-12G","canonicalUrl":"https://icsourcedirect.com/amphenol/034-1121-12G","factsUrl":"https://icsourcedirect.com/api/mcp/products/034-1121-12G","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC HD plug, 75 Ohm, 1 port, right-angle free-hanging, crimp termination, gold-plated center contact, nickel brass body, Belden 4694R cable group, 18 GHz max frequency.","salesMarkdown":"## 75 Ohm HD BNC Plug for Belden 4694R — What's in the Kit This isn't a standard video BNC — the HD (high-density) variant pushes the frequency ceiling to 18 GHz while keeping the 75 Ohm impedance, which means it handles high-resolution broadcast or precision instrumentation signals where a standard 75 Ohm BNC would roll off above 4 GHz. The kit ships as three pieces: the connector body, a crimp ferrule, and a gasket — everything needed to terminate the cable end in one pass, no separate insulator to source. ## What Cable It Takes and How It Terminates Cable group is Belden 4694R — that's the precision 75 Ohm coax used for 3G/HD-SDI broadcast video and high-frequency test leads. The crimp ferrule and gasket are matched to this cable's jacket diameter and dielectric, so the shield termination and environmental seal land correctly. Contact termination is also crimp — no solder pot here. The centre contact crimps onto the signal conductor, the ferrule crimps over the braid and jacket. Shield termination is crimp as well, meaning the outer braid gets captured under the ferrule for a 360° ground. Dielectric material is PTFE — the same polytetrafluoroethylene used in high-frequency coax. It holds the 75 Ohm impedance stable across temperature and doesn't cold-flow under the crimp pressure. The brass body with nickel finish resists corrosion in indoor equipment racks and outdoor broadcast trucks alike. ## Why This Variant Over the 034-1107-12G or 034-1118-12G The 034-1121-12G is the only one in this trio that ships with a gasket and is pre-configured for Belden 4694R. The 034-1107-12G includes a contact and insulator instead of the gasket, and targets Belden 1855 A and 4855R — different cable diameters, different ferrule. The 034-1118-12G swaps the crimp centre contact for a solder termination and includes an end cap and insulator, no ferrule at all. If your BOM calls for Belden 4694R and a full crimp termination with environmental gasket, the 034-1121-12G is the one. The 034-1026 is a standard 4 GHz BNC, same 75 Ohm but nowhere near the 18 GHz bandwidth of the HD variant. If your signal path is below 4 GHz and the cable is RG-122 or Belden 1855, the 034-1026 is a cost-effective alternative — but it lacks the gasket and the high-frequency headroom.","metaTitle":"Amphenol RF 034-1121-12G BNC HD Plug, 75 Ohm, 18 GHz, Crimp","metaDescription":"Amphenol RF 034-1121-12G BNC HD plug, 75 Ohm, 18 GHz max frequency, crimp termination for Belden 4694R. Includes connector, ferrule, and gasket.","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":"-","Includes":"3 pcs - 1 Connector, 1 Ferrule, 1 Gasket","Impedance":"75Ohm","Body Finish":"Nickel","Cable Group":"Belden 4694R","Body Material":"Brass","Housing Color":"Silver","Mating Cycles":"500","Mounting Type":"Free Hanging (In-Line), Right Angle","Connector Type":"Plug, Male Pin","Fastening Type":"Bayonet Lock","Insertion Loss":"-","Product Status":"Active","Connector Style":"BNC, HD","Frequency - Max":"18 GHz","Number of Ports":"1","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Shield Termination":"Crimp","Base Product Number":"034-11","Contact Termination":"Crimp","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-30°C~85°C","Center Contact Plating":"Gold","Center Contact Material":"Phosphor Bronze"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$12.7500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/ea6af0141fd7fa72a2bca0ab877934e2.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/034-1121-12G/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 034-1121-12G and how do I get a price?","answer":"The 034-1121-12G is sourced to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time. No stock-holding claim; all orders quoted per quantity."},{"question":"What cable works with 034-1121-12G?","answer":"The listed cable group is Belden 4694R — a 75 Ohm precision coax used for HD-SDI broadcast video and test instrumentation. The included ferrule and gasket are matched to this cable's diameter."},{"question":"Is 034-1121-12G 50 or 75 ohm?","answer":"75 Ohm — the impedance is specified as 75 Ohm, making it suitable for video, broadcast, and precision measurement systems rather than standard 50 Ohm RF."},{"question":"Does 034-1121-12G include ferrule and gasket?","answer":"Yes, the kit includes three pieces: the connector body, a crimp ferrule, and a gasket. No separate contact or insulator is needed for termination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/034-1121-12G","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/034-1121-12G 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}}