{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"2039550403","brand":"Molex","brandSlug":"molex","productSlug":"2039550403","canonicalUrl":"https://icsourcedirect.com/molex/2039550403","factsUrl":"https://icsourcedirect.com/api/mcp/products/2039550403","rawCanonicalId":null},"summary":{"shortDescription":"Molex SlimStack FSB5 2039550403, 40-position receptacle, 0.016\" (0.40mm) pitch, dual-row, SMT, gold contacts, 2.90mm board height, 5mm mated stack height, solder retention.","salesMarkdown":"## Board-Stacking Fit for Tight Z-Height Budgets The Molex 2039550403 is a 40-position receptacle from the SlimStack FSB5 203955 series, designed for board-to-board mezzanine stacking where the gap between parallel PCBs is fixed at 5 mm. The 0.016\" (0.40 mm) pitch on a dual-row layout packs 40 signal circuits into a compact footprint — the tight pitch means routing traces between pads requires careful clearance planning, but the density saves real estate on both boards. ## Stack Height and the Gap It Lives In The mated stack height is 5 mm, with the receptacle itself sitting 0.114\" (2.90 mm) above the board.","metaTitle":"Molex SlimStack FSB5 2039550403, 0.40mm Pitch","metaDescription":"Molex 2039550403 SlimStack FSB5 receptacle, 40 positions, 0.40mm pitch, 2.90mm board height, 5mm mated stack. Gold contacts, SMT, active production.","metaKeywords":null},"attributes":{"series":"SlimStack FSB5 203955","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 FSB5 203955","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"Solder Retention","Mounting Type":"Surface Mount","Connector Type":"Receptacle, Outer Shroud Contacts","Contact Finish":"Gold","Number of Rows":"2","Product Status":"Active","lifecycle_stage":"unknown","Height Above Board":"0.114\\\" (2.90mm)","Base Product Number":"203955","Number of Positions":"40","Mated Stacking Heights":"5mm","Contact Finish Thickness":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.6000","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.60000","currency":"USD"},{"qty":10,"price":"$2.28500","currency":"USD"},{"qty":100,"price":"$1.81750","currency":"USD"},{"qty":1000,"price":"$1.50595","currency":"USD"},{"qty":3300,"price":"$1.40209","currency":"USD"},{"qty":6600,"price":"$1.35016","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/867eda52592546c632d4d11802c9c973.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the mating connector for 2039550403?","answer":"The 2039550403 is a receptacle with outer shroud contacts; it mates with the corresponding SlimStack FSB5 203955 series header (same pitch and stack height) to form a 5 mm mated pair. The exact header order code depends on the position count and orientation needed — confirm the header part number against the same series for a guaranteed fit."},{"question":"What is the stacking height of 2039550403?","answer":"The mated stacking height is 5 mm, with the receptacle standing 0.114\" (2.90 mm) above the board surface. This defines the gap between the two parallel PCBs when mated with the matching SlimStack FSB5 header."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/molex/2039550403","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/2039550403 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}}