{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"919-431J-51S","brand":"Amphenol","brandSlug":"amphenol","productSlug":"919-431J-51S","canonicalUrl":"https://icsourcedirect.com/amphenol/919-431J-51S","factsUrl":"https://icsourcedirect.com/api/mcp/products/919-431J-51S","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF MCX jack, female socket, 50 Ohm, 6 GHz, snap-on fastening, 500 mating cycles, board edge cutout SMT, gold body, -55°C to 155°C.","salesMarkdown":"## MCX Snap-On Jack for 6 GHz Signal Paths The 919-431J-51S: The snap-on fastening gives quick connect-disconnect cycles — rated for 500 mates — which makes this a natural fit for test ports, antenna feeds, or any RF interconnect that sees regular field reconnection. ## 500 Mating Cycles — Built for Reconnect Duty A snap-on MCX that carries a 500-cycle rating is specced for equipment that gets mated and unmated repeatedly — field-test harnesses, portable radios, or bench-top RF modules where the connector sees daily use. The gold-on-gold contact interface (centre contact and body finish both gold) prevents the fretting corrosion that would otherwise degrade contact resistance over those cycles. The mounting type is board edge with a cutout, surface mount. That means the PCB needs a slot or notch at the edge so the connector body sits partly through the board — the shield solder tabs land on top-side pads while the connector extends past the board edge. This is a specific mechanical feature: the enclosure must have clearance for the protruding jack body, and the cutout dimensions in the manufacturer's drawing must match the PCB outline. Not a standard through-hole or SMT footprint — confirm the cutout geometry before committing the board.","metaTitle":"Amphenol RF 919-431J-51S MCX Jack, 50 Ohm, 6 GHz","metaDescription":"Amphenol RF 919-431J-51S MCX jack, female socket, 50 Ohm impedance, 6 GHz max frequency, snap-on fastening, 500 mating cycles, -55°C to 155°C. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Amphenol RF","Series":"-","Package":"Bag","Features":"-","Includes":"-","Impedance":"50Ohm","Body Finish":"Gold","Cable Group":"-","Body Material":"Brass","Housing Color":"Gold","Mating Cycles":"500","Mounting Type":"Board Edge, Cutout; Surface Mount","Connector Type":"Jack, Female Socket","Fastening Type":"Snap-On","Insertion Loss":"-","Product Status":"Active","Connector Style":"MCX","Frequency - Max":"6 GHz","Number of Ports":"1","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Shield Termination":"Solder","Base Product Number":"91943","Contact Termination":"Solder","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-55°C~155°C","Center Contact Plating":"Gold","Center Contact Material":"Beryllium Copper"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.4100","stockQuantity":18,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/fed3be5cd487dfff3cb4633411e1b68d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 919-431J-51S available via RFQ confirmation?","answer":"Submit an RFQ for the quantity and lead time."},{"question":"What is the impedance of the 919-431J-51S?","answer":"50 Ohm nominal impedance, rated to 6 GHz maximum frequency. The PTFE dielectric and gold-plated beryllium copper centre contact maintain the characteristic impedance through the signal path."},{"question":"What is the mating plug for the 919-431J-51S?","answer":"Any standard 50 Ohm MCX plug with snap-on coupling will mate mechanically and electrically. The MCX interface is a defined industry standard, so the mating half is not proprietary to this jack — confirm the plug's centre pin diameter and dielectric interface match the jack's socket dimensions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/919-431J-51S","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/919-431J-51S 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}}