{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BNC-A-JJ-1(40)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"BNC-A-JJ-1~140~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BNC-A-JJ-1~140~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/BNC-A-JJ-1(40)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose BNC series straight BNC jack-to-jack adapter, female to female, 50 Ohms, 4 GHz, free hanging inline, bayonet lock, silver-plated beryllium copper contacts, bulk.","salesMarkdown":"The Hirose BNC-A-JJ-1(40) is a straight BNC jack-to-jack adapter — a barrel coupler that joins two BNC male cable ends or panel jacks end-to-end. It is a same-series conversion, meaning both ends are BNC female, and it is intended for inline, free-hanging use with no panel or PCB mounting. The adapter is rated for 50 Ohm characteristic impedance and a maximum frequency of 4 GHz, covering the bulk of common RF test, telecom, and video signal paths. The 4 GHz bandwidth ceiling means this barrel will pass signals cleanly up through the low microwave region — think L-band, S-band, and the upper end of cellular backhaul. Below that frequency, the 50 Ohm impedance match keeps return loss acceptable for most test equipment and antenna feeds. The limiting factor at the top end is the BNC interface's own geometry, not the contact material; for a barrel adapter that sees no cable flex, 4 GHz is a solid spec for a bayonet-lock connector. ## Silver-Plated Beryllium Copper Contacts — Cycle Life and Contact Resistance The centre contacts are beryllium copper with silver plating, and the brass body carries a silver finish. Beryllium copper is the standard spring material for RF contacts — it holds its shape through repeated mates without taking a set. The 1000 mating cycle rating is high for a BNC barrel; most economy-grade barrels are good for 500 cycles or fewer. Silver plating gives very low contact resistance at first mate, but it tarnishes in sulfur-rich air over time. For a test-bench barrel that gets cycled regularly, the tarnish film wipes off with each mate. For a fixed installation in a corrosive environment, gold-plated contacts would be preferable — but the silver body finish here is consistent with the Hirose BNC series standard.","metaTitle":"Hirose BNC-A-JJ-1(40) BNC Jack-to-Jack Adapter, 50 Ohm","metaDescription":"Hirose BNC-A-JJ-1(40) straight BNC female-to-female barrel adapter. 50 Ohm impedance, 4 GHz max frequency. Silver-plated beryllium copper contacts.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Style":"Straight","Series":"-","Package":"Bulk","Features":"-","Includes":"-","Impedance":"50 Ohms","Body Finish":"Silver","Adapter Type":"Jack to Jack","Body Material":"Brass","Center Gender":"Female to Female","Mating Cycles":"1000","Mounting Type":"Free Hanging (In-Line)","Adapter Series":"BNC to BNC","Fastening Type":"Bayonet Lock, Bayonet Lock","Insertion Loss":"-","Product Status":"Active","Conversion Type":"Same Series","Frequency - Max":"4 GHz","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Base Product Number":"BNC","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-","Center Contact Plating":"Silver","Center Contact Material":"Beryllium Copper","Convert To (Adapter End)":"BNC Jack, Female Socket","Convert From (Adapter End)":"BNC Jack, Female Socket"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$29.3400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/7eca5fdc3100f922e8521b47944e9d5b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the impedance of BNC-A-JJ-1(40)?","answer":"The BNC-A-JJ-1(40) is a 50 Ohm adapter. It is designed for 50 Ohm cable systems and equipment — standard for RF test, telecom, and broadcast video."},{"question":"Where can I buy BNC-A-JJ-1(40)?","answer":"We source the BNC-A-JJ-1(40) to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity and we will provide a quote from our supply chain."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BNC-A-JJ-1~140~2","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/hirose-electric-co-ltd/BNC-A-JJ-1~140~2 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}}