{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"71991-423LF","brand":"Amphenol","brandSlug":"amphenol","productSlug":"71991-423LF","canonicalUrl":"https://icsourcedirect.com/amphenol/71991-423LF","factsUrl":"https://icsourcedirect.com/api/mcp/products/71991-423LF","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol ICC (FCI) Dubox 71991-423LF, board-to-board receptacle, 46 positions (2×23), 0.100\" (2.54mm) pitch, through-hole, bottom or top entry, push-pull mating, tin-plated phosphor bronze contacts, 78.7 µin (2.00 µm) finish, 11.04mm mated stacking height, UL94 V-0 glass-filled thermoplastic, blue insulation.","salesMarkdown":"## Board Stack Fit and Contact Finish The 71991-423LF: The mated stacking height is 11.04mm, so the board-to-board gap is fixed once the header is pressed in. If your enclosure has a tight z-height budget, verify that the header's post length and the receptacle's insulation height (0.275\") together clear the lid or adjacent board. The thick tin layer resists fretting corrosion better than a flash coat. ## Mounting and Orientation Flexibility The receptacle accepts mating from either the bottom or the top entry, which means the same part can serve as a pass-through on a mid-plane board or as a right-angle mezzanine connector depending on how the header is oriented. No need to stock two different part numbers for the two orientations. The base product number is 71991, and the -423LF suffix indicates the 46-position, tin-plated variant in a tube package. No direct pin-compatible alternative is listed from the manufacturer, so stick with this order code for a drop-in replacement.","metaTitle":"71991-423LF Dubox 46-Position 2.54mm Pitch Receptacle","metaDescription":"Amphenol ICC Dubox 71991-423LF board-to-board receptacle, 46 positions, 0.100\" (2.54mm) pitch, through-hole, 11.04mm stack height, tin contacts.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Pin Headers, Sockets & Housings"],"specifications":{"Style":"Board to Board","title":"71991-423LF","Series":"Dubox™","Package":"Tube","Termination":"Solder","Applications":"Automotive, General Purpose, Industrial, Telecommunications","Contact Type":"Female Socket","Contact Shape":"Square","Mounting Type":"Through Hole","Connector Type":"Receptacle, Bottom or Top Entry","Fastening Type":"Push-Pull","Number of Rows":"2","Pitch - Mating":"0.100\\\" (2.54mm)","Contact Material":"Phosphor Bronze","Insulation Color":"Blue","Insulation Height":"0.275\\\" (6.99mm)","Base Product Number":"71991","Insulation Material":"Thermoplastic, Glass Filled","Number of Positions":"46","Row Spacing - Mating":"0.100\\\" (2.54mm)","Contact Finish - Post":"Tin","Contact Length - Post":"0.118\\\" (3.00mm)","Mated Stacking Heights":"11.04mm","Contact Finish - Mating":"Tin","Number of Positions Loaded":"All","Material Flammability Rating":"UL94 V-0","Contact Finish Thickness - Post":"78.7µin (2.00µm)","Contact Finish Thickness - Mating":"78.7µin (2.00µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.9737","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/d12387c44afc462d5fb4943551712d4d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy 71991-423LF?","answer":"Availability and current pricing confirmed at quote time — submit an RFQ for this exact order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/71991-423LF","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/71991-423LF 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}}