{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"034-1139-12G","brand":"Amphenol","brandSlug":"amphenol","productSlug":"034-1139-12G","canonicalUrl":"https://icsourcedirect.com/amphenol/034-1139-12G","factsUrl":"https://icsourcedirect.com/api/mcp/products/034-1139-12G","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol 034-1139-12G HD-BNC™ jack, 75 Ohm, 18 GHz, panel mount bulkhead, gold body, bayonet lock, 500 mating cycles.","salesMarkdown":"## 75 Ohm HD-BNC Jack for 18 GHz Signal Paths The Amphenol 034-1139-12G is a 75 Ohm HD-BNC™ jack, female socket, designed for signal paths that push past the 4 GHz ceiling of standard BNC. Rated to 18 GHz, this bulkhead-mount connector uses a bayonet lock and isolated construction to maintain impedance through the panel interface. ## Impedance and Frequency — What the 75 Ohm and 18 GHz Ratings Mean The 75 Ohm impedance targets video distribution, broadband CATV, and high-resolution imaging systems — not the 50 Ohm world of RF test gear. Mating a 75 Ohm jack into a 50 Ohm line creates a 1.5:1 VSWR bump that degrades return loss at higher frequencies. The 18 GHz maximum frequency is the upper bound of the HD-BNC interface; standard BNC typically rolls off around 4 GHz. For a 3 GHz HD-SDI signal this connector has headroom well beyond the fundamental. ## Mounting and Termination — Bulkhead Fit and Solder Connection Panel mount with a front-side nut through a bulkhead hole, secured by the through-hole solder posts. The shield termination is solder, as is the centre contact — no crimp tooling required. The isolated feature means the connector body is electrically separated from the panel ground, useful where ground loops must be broken.","metaTitle":"034-1139-12G HD-BNC Jack, 75 Ohm, 18 GHz, Gold Body","metaDescription":"034-1139-12G HD-BNC jack, 75 Ohm impedance, 18 GHz max frequency, 500 mating cycles. Panel mount bulkhead with bayonet lock.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Amphenol RF","Series":"HD-BNC™","Package":"Bag","Features":"Isolated","Includes":"-","Impedance":"75 Ohms","Body Finish":"Gold","Cable Group":"-","Body Material":"Brass","Housing Color":"Gold","Mating Cycles":"500","Mounting Type":"Panel Mount, Through Hole","Connector Type":"Jack, Female Socket","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":"Bulkhead - Front Side Nut","Ingress Protection":"-","Shield Termination":"Solder","Base Product Number":"034-11","Contact Termination":"Solder","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-40°C ~ 85°C","Center Contact Plating":"Gold","Center Contact Material":"Beryllium Copper"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.8200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/15fab9a7c08a6b0a63c2b4f375697454.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/034-1139-12G/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/034-1139-12G","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/034-1139-12G 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}}