{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DF17A(4.0)-40DP-0.5V(57)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"DF17A~14.0~2-40DP-0.5V~157~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF17A~14.0~2-40DP-0.5V~157~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/DF17A(4.0)-40DP-0.5V(57)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose DF17 series, 40-position 0.50mm pitch header, outer shroud contacts, dual-row SMT, gold contact finish, 6.30mm height above board, 7mm/8mm mated stacking heights.","salesMarkdown":"## Board-to-Board Stacking Header for Tight Z-Height Budgets The Hirose DF17A(4.0)-40DP-0.5V(57) is a 40-position, dual-row header with outer shroud contacts, part of the DF17 series designed for parallel board-to-board stacking. It uses a 0.50mm pitch and surface-mount termination, with gold-plated contacts throughout. The connector supports two mated stacking heights — 7mm and 8mm — giving the board layout engineer flexibility to match the z-height budget without changing the header footprint. ## Stacking Height and Footprint Fit That 0.70mm to 1.70mm gap between header top and receptacle bottom is where the contact beams engage. For a 0.50mm pitch dual-row layout, the footprint is tight: each row of 20 contacts on 0.50mm centers means the outer rows span about 9.5mm across the body. The board guide adds about 0.5mm to each end of the keep-out zone, so account for that in the component clearance area. ## What the 40-Position Count Tells You 40 positions at 0.50mm pitch in two rows means 20 contacts per row — a common count for parallel bus interfaces or display ribbon replacements. The outer shroud contacts wrap around the mating receptacle, providing mechanical alignment and some EMC containment by surrounding the signal interface. Gold plating on all contacts supports repeated mating cycles; this isn't a one-and-done connector. ## Comparing the DF17A Variant to Its Siblings The DF17A(4.0)-40DP-0.5V(57) shares the same 0.50mm pitch and 6.30mm height above board as the DF17(4.0)-40DP-0.5V(57), but the DF17A adds a board guide feature that the base DF17 version lacks — the base part uses solder retention instead. For a 50-position alternative at the same stacking height, the DF17(4.0)-50DP-0.5V(57) gives you 10 more signal lines in the same footprint length, but the pitch stays 0.50mm so the routing challenge scales with position count. The DF17A(2.0)-80DP-0.5V(57) drops the height to 4.30mm above board for a lower-profile stack, useful when the z-height budget is under 5mm.","metaTitle":"Hirose DF17A(4.0)-40DP-0.5V(57), 40 Pos 0.50mm Pitch Header","metaDescription":"Hirose DF17A(4.0)-40DP-0.5V(57) 40-position 0.50mm pitch SMT header, gold contacts, 7mm/8mm stacking height. Active production, RoHS compliant.","metaKeywords":null},"attributes":{"series":"DF17","packageCase":null,"mountingType":null,"rohsStatus":"RoHS Compliant","productStatus":"Active","categoryPath":["Board-to-Board Connectors","Mezzanine & Stacking Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Pitch":"0.020\\\" (0.50mm)","Series":"DF17","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"Board Guide","Mounting Type":"Surface Mount","Connector Type":"Header, Outer Shroud Contacts","Contact Finish":"Gold","Number of Rows":"2","Product Status":"Active","lifecycle_stage":"unknown","Height Above Board":"0.248\\\" (6.30mm)","Base Product Number":"DF17","Number of Positions":"40","Mated Stacking Heights":"7mm, 8mm","Contact Finish Thickness":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.5600","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.56000","currency":"USD"},{"qty":10,"price":"$3.23300","currency":"USD"},{"qty":100,"price":"$2.84820","currency":"USD"},{"qty":500,"price":"$2.42096","currency":"USD"},{"qty":1000,"price":"$2.06494","currency":"USD"},{"qty":2000,"price":"$1.99374","currency":"USD"},{"qty":3000,"price":"$1.92253","currency":"USD"},{"qty":5000,"price":"$1.85133","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/d9a7044977e6159e246a256417cb4709.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the stacking height of the DF17A(4.0)-40DP-0.5V(57)?","answer":"The DF17A(4.0)-40DP-0.5V(57) supports mated stacking heights of 7mm and 8mm, depending on the mating receptacle selected. The header itself sits 6.30mm above the board."},{"question":"What are the alternatives to the Hirose DF17A(4.0)-40DP-0.5V(57)?","answer":"The closest alternative is the DF17(4.0)-40DP-0.5V(57), which has the same 40 positions, 0.50mm pitch, and 6.30mm height but uses solder retention instead of a board guide. For more positions, the DF17(4.0)-50DP-0.5V(57) offers 50 positions at the same stacking height."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF17A~14.0~2-40DP-0.5V~157~2","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/hirose-electric-co-ltd/DF17A~14.0~2-40DP-0.5V~157~2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:46:37.382Z","lastPublished":"2026-07-22T19:46:37.382Z","indexable":true}}