{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"142138-75","brand":"Amphenol","brandSlug":"amphenol","productSlug":"142138-75","canonicalUrl":"https://icsourcedirect.com/amphenol/142138-75","factsUrl":"https://icsourcedirect.com/api/mcp/products/142138-75","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF SMB mini jack, male pin, 75 Ohm, through-hole, gold body, snap-on fastening, 500 mating cycles, 0.3 dB insertion loss.","salesMarkdown":"The 142138-75: Active lifecycle — no obsolescence flag on this line. Gold body finish and gold centre contact plating resist corrosion across the 500-cycle life. ## 50 Ohm vs 75 Ohm – Which SMB Jack Fits Your Line The 142138-75 is a 75 Ohm jack. The sibling 142138 (base number 1421) is the 50 Ohm version — same brass/gold body, same snap-on coupling, same 500-cycle rating, same PTFE dielectric. The impedance is the only selection difference, but it is non-negotiable: a 75 Ohm jack in a 50 Ohm system destroys return loss. Match the impedance to your cable and board trace.","metaTitle":"Amphenol RF 142138-75 SMB Jack, 75 Ohm, Through Hole, Gold","metaDescription":"Amphenol RF 142138-75 SMB mini jack, male pin, 75 Ohm impedance, through-hole solder, gold body, 500 mating cycles. Active production, quoted to order.","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":"-","Impedance":"75Ohm","Body Finish":"Gold","Cable Group":"-","Body Material":"Brass","Housing Color":"Gold","Mating Cycles":"500","Mounting Type":"Through Hole","Connector Type":"Jack, Male Pin","Fastening Type":"Snap-On","Insertion Loss":"0.3dB","Product Status":"Active","Connector Style":"SMB, Mini","Number of Ports":"1","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Shield Termination":"Solder","Base Product Number":"142138","Contact Termination":"Solder","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Gold","Center Contact Material":"Brass"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.3500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/e9a12a7cff11c8cf0826e4e3fbea9ef4.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/142138-75/alternatives.json"},"ai":{"faq":[{"question":"What is the body material and finish of 142138-75?","answer":"Brass body with gold finish. The centre contact is also brass with gold plating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/142138-75","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/142138-75 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}}