{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"142189-75","brand":"Amphenol","brandSlug":"amphenol","productSlug":"142189-75","canonicalUrl":"https://icsourcedirect.com/amphenol/142189-75","factsUrl":"https://icsourcedirect.com/api/mcp/products/142189-75","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF SMB, Mini, Jack, Male Pin, 75Ohm, Free Hanging, Crimp, Bulk, 1 Port, RG-179, 187 Cable Group.","salesMarkdown":"## 75 Ohm SMB Mini Jack for RG-179 — Field Termination Kit The body is machined brass with gold finish, and the centre contact is also gold-plated brass. The PTFE dielectric maintains stable impedance across that temperature band. This jack is specified for cable groups RG-179 and RG-187 — both 75 Ohm miniature coax types with a nominal diameter around 2.5 mm (0.098 in). The shield termination is crimp, and the centre contact termination is also crimp, using the included contact and ferrule. The heat shrink tubing slides over the ferrule and cable jacket after crimping to seal the termination against moisture and strain. Because this is a jack (female outer shell, male centre pin), it mates with any SMB plug that has a female centre socket and snap-on latch. The 75 Ohm impedance must be matched end-to-end — mating a 75 Ohm jack to a 50 Ohm plug creates a reflection at the interface that degrades signal integrity above a few hundred MHz. ## 75 Ohm vs 50 Ohm — Why It Matters The 142194 is a 50 Ohm SMB plug (female socket) with solder centre contact and crimp shield, also a kit but with an end cap instead of a connector body. It is the mating half for a 50 Ohm system, not a cross-shop alternative for this 75 Ohm jack.","metaTitle":"Amphenol RF 142189-75 SMB Mini Jack, 75 Ohm, RG-179 Kit","metaDescription":"Amphenol RF 142189-75 SMB mini jack, 75 Ohm impedance, for RG-179/187 cable. Gold-plated brass body, snap-on fastening, 500 mating cycles.","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":"4 pcs - 1 Connector, 1 Contact, 1 Ferrule, 1 Heat Shrink","Impedance":"75Ohm","Body Finish":"Gold","Cable Group":"RG-179, 187","Body Material":"Brass","Housing Color":"Gold","Mating Cycles":"500","Mounting Type":"Free Hanging (In-Line)","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":"Crimp","Base Product Number":"142189","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":"$6.1800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/81e56a6de69bd774737d4f9e0cdcc179.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/142189-75/alternatives.json"},"ai":{"faq":[{"question":"What is the impedance of Amphenol RF 142189-75?","answer":"The 142189-75 is a 75 Ohm SMB mini jack, specified for 75 Ohm systems such as video, CCTV, and broadcast applications."},{"question":"Is 142189-75 compatible with RG-179 cable?","answer":"Yes, the 142189-75 is specified for cable groups RG-179 and RG-187. It includes a crimp contact, ferrule, and heat shrink for terminating these cables."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/142189-75","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/142189-75 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}}