{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"919-128J-51SX","brand":"Amphenol","brandSlug":"amphenol","productSlug":"919-128J-51SX","canonicalUrl":"https://icsourcedirect.com/amphenol/919-128J-51SX","factsUrl":"https://icsourcedirect.com/api/mcp/products/919-128J-51SX","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol MCX jack, 50 Ohm, bulkhead front-side nut mount, snap-on coupling, gold body, solder center contact, crimp shield, for RG-174/188/316/LMR-100, DC to 6 GHz, 0.1 dB insertion loss, 500 mating cycles, -65 to 165 °C, includes hardware.","salesMarkdown":"The gold-plated brass body and beryllium copper center contact with gold plating support 500 mating cycles with stable contact resistance. This jack accepts RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174 cables — the most common small-diameter coax types for short-run RF interconnects. The center contact is solder-terminated; the shield is crimped using the included ferrule. The kit ships with one connector, one contact, one ferrule, one lockwasher, and one nut — everything needed for a single cable assembly except the cable and solder. ## Mounting and RF Performance Mounts through a panel bulkhead with a front-side nut — the lockwasher prevents loosening under vibration. The PTFE dielectric keeps insertion loss to 0.1 dB across the DC-to-6 GHz band, making it suitable for sensitive receive paths or low-power transmit stages. The snap-on interface is keyed to the MCX standard; it mates with any standard MCX plug.","metaTitle":"Amphenol 919-128J-51SX MCX Jack, 50 Ohm, 6 GHz, Bulkhead","metaDescription":"Amphenol 919-128J-51SX MCX jack, 50 Ohm, 6 GHz, gold body, snap-on, bulkhead mount. Includes connector, contact, ferrule, lockwasher, nut.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Amphenol RF","Series":"-","Package":"Bulk","Features":"-","Includes":"5 pcs - 1 Connector, 1 Contact, 1 Ferrule, 1 Lockwasher, 1 Nut","Impedance":"50Ohm","Body Finish":"Gold","Cable Group":"RG-174, 188, 188A, 316, LMR-100, M17/119-RG174","Body Material":"Brass","Housing Color":"Gold","Mating Cycles":"500","Mounting Type":"Panel Mount","Connector Type":"Jack, Female Socket","Fastening Type":"Snap-On","Insertion Loss":"0.1dB","Product Status":"Active","Connector Style":"MCX","Frequency - Max":"6 GHz","Number of Ports":"1","lifecycle_stage":"unknown","Mounting Feature":"Bulkhead - Front Side Nut","Ingress Protection":"-","Shield Termination":"Crimp","Base Product Number":"91912","Contact Termination":"Solder","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Gold","Center Contact Material":"Beryllium Copper"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.8300","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/919-128J-51SX/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 919-128J-51SX?","answer":"Submit a request for current pricing and availability — confirmed at quote time."},{"question":"What cables are compatible with the 919-128J-51SX?","answer":"It accepts RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174 cables."},{"question":"Does the 919-128J-51SX come with mounting hardware?","answer":"Yes, the kit includes a lockwasher and nut for bulkhead mounting, plus the connector, contact, and ferrule."},{"question":"What is the impedance of the 919-128J-51SX?","answer":"50 Ohm nominal impedance, standard for most RF systems."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/919-128J-51SX","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/919-128J-51SX 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}}