{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"142191-75","brand":"Amphenol","brandSlug":"amphenol","productSlug":"142191-75","canonicalUrl":"https://icsourcedirect.com/amphenol/142191-75","factsUrl":"https://icsourcedirect.com/api/mcp/products/142191-75","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF SMB mini jack, male pin, 75 Ohm, panel mount bulkhead, crimp termination, for RG-179/187 cable, kit includes 6 pcs, gold body, 500 mating cycles.","salesMarkdown":"## 75 Ohm SMB Mini Jack for RG-179/187 — Kit Form The 75 Ohm impedance and SMB snap-on coupling distinguish it from the more common 50 Ohm SMB variants; it is sized for RG-179 and RG-187 coaxial cables, which are typical in video, broadcast, and broadband data applications where 75 Ohm characteristic impedance is the standard. ## What the 75 Ohm Rating Means for Signal Path Design A 50 Ohm SMB jack like the 142138 will not maintain the correct impedance match on a 75 Ohm cable run, causing signal reflections and insertion loss penalties. The 142191-75 is the correct choice when the system impedance is 75 Ohm; the connector style is SMB mini, which is physically smaller than a BNC but uses the same snap-on bayonet-style coupling for quick matings. Insertion loss is rated at 0.3 dB, which is typical for a well-matched SMB interface at lower frequencies. ## Kit Contents and Cable Termination The kit includes six pieces: the SMB connector body, one crimp-style center contact, a crimp ferrule, a section of heat shrink tubing, a lockwasher, and a bulkhead mounting nut. The contact and shield termination are both crimp-style for RG-179 and RG-187 cables.","metaTitle":"Amphenol RF 142191-75 SMB Mini Jack, 75 Ohm, Bulkhead","metaDescription":"Amphenol RF 142191-75 SMB mini jack, male pin, 75 Ohm impedance, panel mount bulkhead. Kit includes connector, contact, ferrule, heat shrink, lockwasher, nut.","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":"6 pcs - 1 Connector, 1 Contact, 1 Ferrule, 1 Heat Shrink, 1 Lockwasher, 1 Nut","Impedance":"75Ohm","Body Finish":"Gold","Cable Group":"RG-179, 187","Body Material":"Brass","Housing Color":"Gold","Mating Cycles":"500","Mounting Type":"Panel Mount","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":"Bulkhead - Front Side Nut","Ingress Protection":"-","Shield Termination":"Crimp","Base Product Number":"142191","Contact Termination":"Crimp","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Gold","Center Contact Material":"Brass"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.0500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/fea8a2d603cf3f1916d1f328409bd4af.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/142191-75/alternatives.json"},"ai":{"faq":[{"question":"What is the impedance of 142191-75?","answer":"The Amphenol RF 142191-75 is a 75 Ohm SMB mini jack."},{"question":"Is 142191-75 a panel mount BNC jack?","answer":"No — it is an SMB mini jack, not a BNC. SMB is physically smaller and uses a snap-on coupling instead of the bayonet lock of a BNC. It is panel mount via a bulkhead with a front-side nut."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/142191-75","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/142191-75 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}}