{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BNCP-UMJ(40)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"BNCP-UMJ~140~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BNCP-UMJ~140~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/BNCP-UMJ(40)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose BWA series BNC to U.FL (UMCC) adapter, straight, plug to jack, 50 Ohms, DC to 1 GHz, 1000 mating cycles, free-hanging inline.","salesMarkdown":"## BNC to U.FL Between-Series Adapter The Hirose BNCP-UMJ(40) is a between-series RF adapter that converts a BNC Plug, Male Pin to a U.FL (UMCC) Jack, Male Pin. It belongs to the BWA series and is designed as a free-hanging (in-line) straight adapter, meaning it sits inline with the cable path — no right-angle bend to route around enclosures. ## What the 1 GHz Limit Means in Practice The 1 GHz maximum frequency is the combined limit of this adapter's construction — the BNC bayonet interface, the U.FL snap-on connection, and the internal transition between centre conductors. For signals below 1 GHz (GPS at 1.575 GHz is out; cellular LTE bands, ISM 915 MHz, and most test-equipment reference signals are in), the 50 Ohm path through the PTFE dielectric maintains a clean impedance match. Above 1 GHz, expect roll-off in return loss that makes this adapter unsuitable for precision measurements or wideband data links. ## Obsolete — Sourcing Reality There is no listed direct replacement from Hirose. If you need a production-available alternative, the closest functional match would be a different between-series adapter (BNC to U.FL) from another manufacturer, but pinout and mechanical fit must be verified against your existing assembly. ## Mating Cycles and Field Service Rated for 1000 mating cycles — a high figure for an adapter that sees repeated connect/disconnect in test setups or field-service cable assemblies. The gold-plated centre contacts (male-to-male through the adapter) resist fretting corrosion over that cycle life. The PTFE dielectric holds its dielectric constant through temperature swings, so the impedance stays stable across repeated thermal cycles in outdoor or unheated equipment enclosures.","metaTitle":"Hirose BNCP-UMJ(40) BNC to U.FL Adapter, 50 Ohm, 1 GHz","metaDescription":"Hirose BNCP-UMJ(40) between-series adapter converts BNC plug to U.FL jack. 50 Ohm impedance, DC to 1 GHz, 1000 mating cycles.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Style":"Straight","Series":"BWA","Package":"Bulk","Features":"-","Includes":"-","Impedance":"50 Ohms","Body Finish":"-","Adapter Type":"Plug to Jack","Body Material":"-","Center Gender":"Male to Male","Mating Cycles":"1000","Mounting Type":"Free Hanging (In-Line)","Adapter Series":"BNC to U.FL (UMCC)","Fastening Type":"Bayonet Lock, Snap-On","Insertion Loss":"-","Product Status":"Obsolete","Conversion Type":"Between Series","Frequency - Max":"1 GHz","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Base Product Number":"BNC","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-","Center Contact Plating":"-","Center Contact Material":"-","Convert To (Adapter End)":"U.FL (UMCC) Jack, Male Pin","Convert From (Adapter End)":"BNC Plug, Male Pin"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$31.7600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/35af041d42b34e0375c2f15777385751.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy BNCP-UMJ(40) today?","answer":"The BNCP-UMJ(40) is obsolete but can be sourced through our independent distribution channel."},{"question":"Is BNCP-UMJ(40) obsolete?","answer":"Yes, the manufacturer lists this part as obsolete. Sourcing is limited to surplus and broker inventory — quoted per RFQ."},{"question":"What is the difference between BNCP-UMJ and BNCP-UMJ(40)?","answer":"The (40) suffix typically denotes a packaging or revision variant in Hirose's BWA series. The electrical and mechanical specifications — 50 Ohm impedance, 1 GHz max frequency, BNC-to-U.FL conversion, straight body — are identical between the two. The exact difference is not documented in the available spec data; both are obsolete and sourced the same way."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BNCP-UMJ~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/BNCP-UMJ~140~2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:25.888Z","lastPublished":"2026-07-20T14:34:25.888Z","indexable":true}}