{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0559090474","brand":"Molex","brandSlug":"molex","productSlug":"0559090474","canonicalUrl":"https://icsourcedirect.com/molex/0559090474","factsUrl":"https://icsourcedirect.com/api/mcp/products/0559090474","rawCanonicalId":null},"summary":{"shortDescription":"Molex SlimStack 55909 series, Plug Outer Shroud Contacts, 40 positions, 2 rows, 0.016\" (0.40mm) pitch, Surface Mount, Gold 8.00µin, 1.5mm mated stacking height, Solder Retention.","salesMarkdown":"The Molex 0559090474 is a 40-position plug from the SlimStack 55909 series, designed as the board-to-board mezzanine interconnect for compact portable devices. The mated stack height lands at 1.5mm — a specific z-height that suits thin enclosures where the board pair sits close together. The solder retention feature anchors the plug to the board during reflow, preventing the part from floating off the pads as the paste wets out. This is a surface-mount plug with outer shroud contacts, meaning the mating receptacle slides inside the shroud for alignment. The 1.5mm mated stacking height is the single dimension that governs the mechanical fit in a mezzanine stack-up. It defines the z-height from the bottom of the plug board to the top of the receptacle board. If the enclosure has a 2.0mm gap allowance, this connector fits with 0.5mm clearance above the top board. If the gap is 1.2mm, it does not fit — no shimming, no spacer. The 0.40mm pitch drives the routing density on the board. Each signal pair occupies 0.80mm center-to-center across two rows, which forces fine-line PCB traces — typically 0.15mm line/space or tighter — between the pads. A standard 0.50mm pitch connector would use wider traces, so swapping this part into an existing layout without re-spinning the board is not possible.","metaTitle":"Molex 0559090474 SlimStack Plug, 40 Pos, 0.40mm Pitch","metaDescription":"Molex 0559090474 SlimStack 55909 plug, 40 positions, 0.40mm pitch, 1.5mm mated stack height. Gold contacts, solder retention. ROHS3. Active — quoted to order.","metaKeywords":null},"attributes":{"series":"SlimStack 55909","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Board-to-Board Connectors","Mezzanine & Stacking Connectors"],"specifications":{"Mfr":"Molex","Pitch":"0.016\\\" (0.40mm)","Series":"SlimStack 55909","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"Solder Retention","Mounting Type":"Surface Mount","Connector Type":"Plug, Outer Shroud Contacts","Contact Finish":"Gold","Number of Rows":"2","Product Status":"Active","lifecycle_stage":"unknown","Height Above Board":"0.045\\\" (1.14mm)","Base Product Number":"055909","Number of Positions":"40","Mated Stacking Heights":"1.5mm","Contact Finish Thickness":"8.00µin (0.203µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.1600","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.16000","currency":"USD"},{"qty":10,"price":"$2.77800","currency":"USD"},{"qty":100,"price":"$2.20940","currency":"USD"},{"qty":1000,"price":"$1.83062","currency":"USD"},{"qty":2500,"price":"$1.70438","currency":"USD"},{"qty":5000,"price":"$1.64125","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/78ce91f30129637d60f32f924920a00c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the mated stacking height for Molex 0559090474?","answer":"The mated stacking height is 1.5mm. This is the fixed z-height from the bottom of the plug board to the top of the receptacle board when mated with the matching SlimStack 55909 receptacle."},{"question":"Is Molex 0559090474 RoHS compliant?","answer":"Yes, the 0559090474 is rated ROHS3 Compliant."},{"question":"Where can I buy Molex 0559090474 with fast shipping?","answer":"This part is active and quoted to order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/molex/0559090474","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/molex/0559090474 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:52:26.615Z","lastPublished":"2026-08-11T15:52:26.615Z","indexable":true}}