{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DF37NB-40DS-0.4V(51)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"DF37NB-40DS-0.4V~151~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF37NB-40DS-0.4V~151~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/DF37NB-40DS-0.4V(51)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose DF37 series, 0.016\" (0.40mm) pitch, 40 positions, 2 rows, SMT receptacle, center strip contacts, gold 2.00µin plating, 0.97mm height above board, solder retention, Tape & Reel.","salesMarkdown":"## Board-fit reality: 0.40mm pitch, SMT, 40 positions The Hirose DF37NB-40DS-0.4V(51) is a 40-position, dual-row receptacle from the DF37 series, designed for board-to-board mezzanine stacking. It uses a 0.016\" (0.40mm) pitch — that is the tightest in the DF37 line — and mounts via surface-mount soldering with a solder retention feature to hold it in place during reflow. The connector stands 0.038\" (0.97mm) above the board and mates to a stacking height of 0.98mm, which sets the z-gap between parallel PCBs. ## What 40 positions at 0.40mm pitch means for your layout The 0.40mm pitch is the dominant selection factor here. It drives the PCB footprint — you need tight trace-and-space routing between pads, and the stencil aperture for the SMT paste must be sized to avoid bridging. The 40 positions in two rows give you a dense I/O or mezzanine interconnect, but the fine pitch limits current per contact well below what a 0.50mm or 0.80mm connector would carry. The DF37 series offers the same 0.40mm pitch and 0.97mm height in 34-position (DF37NB-34DS-0.4V(51)) and 50-position (DF37NB-50DS-0.4V(53)) variants. The 40-position version here sits between them — if your BOM calls for 34 or 50 circuits, the footprint and stack height are identical, so the board layout transfers.","metaTitle":"Hirose DF37NB-40DS-0.4V(51) Receptacle, 40 Pos, 0.40mm Pitch","metaDescription":"Hirose DF37NB-40DS-0.4V(51) 40-position 0.40mm pitch SMT receptacle, gold contacts, 0.97mm height. Active production. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":"DF37","packageCase":null,"mountingType":null,"rohsStatus":"RoHS Compliant","productStatus":"Active","categoryPath":["Board-to-Board Connectors","Mezzanine & Stacking Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Pitch":"0.016\\\" (0.40mm)","Series":"DF37","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"Solder Retention","Mounting Type":"Surface Mount","Connector Type":"Receptacle, Center Strip Contacts","Contact Finish":"Gold","Number of Rows":"2","Product Status":"Active","lifecycle_stage":"unknown","Height Above Board":"0.038\\\" (0.97mm)","Base Product Number":"DF37N","Number of Positions":"40","Mated Stacking Heights":"0.98mm","Contact Finish Thickness":"2.00µin (0.051µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3200","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.32000","currency":"USD"},{"qty":10,"price":"$1.11400","currency":"USD"},{"qty":25,"price":"$1.06800","currency":"USD"},{"qty":50,"price":"$1.04540","currency":"USD"},{"qty":100,"price":"$0.99990","currency":"USD"},{"qty":250,"price":"$0.90900","currency":"USD"},{"qty":500,"price":"$0.81810","currency":"USD"},{"qty":1000,"price":"$0.72720","currency":"USD"},{"qty":2500,"price":"$0.65902","currency":"USD"},{"qty":8000,"price":"$0.60449","currency":"USD"},{"qty":16000,"price":"$0.59085","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/3aa4291611ad64fcbe6042571475da76.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the mating connector for DF37NB-40DS-0.4V(51)?","answer":"This is a receptacle with center strip contacts — it mates with the matching DF37 series header of the same pitch and position count. The mated stacking height is 0.98mm."},{"question":"Is DF37NB-40DS-0.4V(51) RoHS compliant?","answer":"Yes, the DF37NB-40DS-0.4V(51) is listed as RoHS Compliant."},{"question":"What is the height above board of DF37NB-40DS-0.4V(51)?","answer":"The height above board is 0.038\" (0.97mm), with a mated stacking height of 0.98mm."},{"question":"Where can I buy DF37NB-40DS-0.4V(51)?","answer":"This part is sourced per RFQ — contact our sales team for pricing and lead time on your BOM quantity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF37NB-40DS-0.4V~151~2","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/DF37NB-40DS-0.4V~151~2 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}}