{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5055514020","brand":"Molex","brandSlug":"molex","productSlug":"5055514020","canonicalUrl":"https://icsourcedirect.com/molex/5055514020","factsUrl":"https://icsourcedirect.com/api/mcp/products/5055514020","rawCanonicalId":null},"summary":{"shortDescription":"Molex SlimStack 505551 series, 5055514020, plug outer shroud contacts, 40 positions, 2 rows, 0.016\" (0.40mm) pitch, surface mount, gold 4.00µin, 0.8mm stacking height, solder retention.","salesMarkdown":"## Board-to-Board Mezzanine Plug for Tight Stack Heights The Molex 5055514020 is a 40-position plug from the SlimStack 505551 series, designed for parallel board-to-board mezzanine connections. With a 0.016\" (0.40mm) pitch and a mated stacking height of 0.8mm, this connector is built for dense, low-profile interconnects where board spacing is at a premium. ## What the 0.40mm Pitch and 0.8mm Stack Height Mean for Your Layout The 0.8mm mated stack height is the key dimension for the z-axis budget: it sets the gap between the two PCBs, so the mating receptacle (the 505551 series receptacle, same pitch and row count) must be paired to achieve this height. The two-row, 40-position layout gives 20 contacts per row, which is a dense signal count for a board edge that measures roughly 8mm along the mating axis. On a part this small (0.68mm above board), the retention tabs prevent tombstoning and keep the connector aligned through the solder paste reflow cycle. The surface mount termination suits standard pick-and-place assembly; the Tape & Reel packaging (Cut Tape option also available) feeds directly into the feeder. ## Mating Connector and Compatibility The 5055514020 mates with the matching SlimStack 505551 series receptacle — the same 40-position, 2-row, 0.40mm pitch configuration. The receptacle is the female half with the same outer shroud design, ensuring the plug's contacts are protected during mating. There is no official cross-reference or replacement on record; the 505551 series is the current active line for this form factor. If you need a different stack height, the SlimStack family includes other members with varying heights, but the pitch and contact arrangement are series-specific.","metaTitle":"Molex SlimStack 5055514020 Plug, 40 Pos, 0.40mm Pitch","metaDescription":"Molex 5055514020 SlimStack plug, 40 positions, 0.40mm pitch, 0.8mm stack height, gold contacts, SMT with solder retention. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":"SlimStack 505551","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 505551","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":"0.027\\\" (0.68mm)","Base Product Number":"505551","Number of Positions":"40","Mated Stacking Heights":"0.8mm","Contact Finish Thickness":"4.00µin (0.100µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8328","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.96000","currency":"USD"},{"qty":1,"price":"$1.69000","currency":"USD"},{"qty":10,"price":"$1.44000","currency":"USD"},{"qty":10,"price":"$1.67300","currency":"USD"},{"qty":100,"price":"$1.38170","currency":"USD"},{"qty":100,"price":"$1.18980","currency":"USD"},{"qty":1000,"price":"$0.93930","currency":"USD"},{"qty":1000,"price":"$1.09080","currency":"USD"},{"qty":2500,"price":"$1.01808","currency":"USD"},{"qty":2500,"price":"$0.87668","currency":"USD"},{"qty":7000,"price":"$0.83285","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/4bff1ad04fbb5ecbd4b0349dacbab05c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the mating connector for molex 5055514020?","answer":"The 5055514020 mates with the matching SlimStack 505551 series receptacle — a 40-position, 2-row, 0.40mm pitch receptacle with outer shroud contacts. Both halves are from the same series and share the same footprint."},{"question":"What is the stacking height of molex 5055514020?","answer":"The mated stacking height is 0.8mm when paired with the matching SlimStack receptacle. The plug itself has a height above board of 0.027\" (0.68mm)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/molex/5055514020","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/5055514020 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}}