{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DF12NB(3.5)-40DP-0.5V(51)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"DF12NB~13.5~2-40DP-0.5V~151~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF12NB~13.5~2-40DP-0.5V~151~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/DF12NB(3.5)-40DP-0.5V(51)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose DF12 series, 40 position header, 0.020\" (0.50mm) pitch, dual row, outer shroud contacts, surface mount, gold plating, 3.5mm mated stacking height, solder retention features.","salesMarkdown":"## 40-Position Mezzanine Header with 3.5mm Stack Height The Hirose DF12NB(3.5)-40DP-0.5V(51) is a 40-position header from the DF12 series, designed for board-to-board mezzanine stacking. Gold-plated contacts with 8.00µin thickness on the mating surface support repeated connection cycles in signal-level applications. ## What the 3.5mm Stack Height Means for Your Board Stack-Up This is the fixed board-to-board gap when the pair is mated. The height above board of this header alone is 0.110\" (2.80mm) — that's the profile the header stands off the PCB before the receptacle is mated. For comparison, the DF12NB(3.0)-40DP-0.5V(51) provides a 2.30mm height above board and mates to a 3.0mm stack — a 0.5mm difference that can matter when routing traces under the connector or fitting into a tight enclosure. This 40-position header shares the same 0.50mm pitch, dual-row layout, and 3.5mm stack height with the 36-position DF12NB(3.5)-36DP-0.5V(51) and the 50-position DF12NB(3.5)-50DP-0.5V(51). All three use the same 8.00µin gold plating and outer shroud contact design, so the signal integrity and cycle life are consistent across the range. ## Surface Mount Assembly and Solder Retention This header is surface mount only — no through-hole posts. In a mezzanine stack, the connector pair takes shear loads from board handling and vibration; the retention tabs help keep the header from lifting off the pad over temperature cycles.","metaTitle":"Hirose DF12NB(3.5)-40DP-0.5V(51) Header, 40 Pos","metaDescription":"Hirose DF12 series header, 40 positions, 0.50mm pitch, 3.5mm mated stack height. Gold contacts, SMT, active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":"DF12","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":"DF12","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Solder Retention","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":"0.110\\\" (2.80mm)","Base Product Number":"DF12N","Number of Positions":"40","Mated Stacking Heights":"3.5mm","Contact Finish Thickness":"8.00µin (0.203µm)"}},"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":2000,"price":"$0.68175","currency":"USD"},{"qty":3000,"price":"$0.65903","currency":"USD"},{"qty":5000,"price":"$0.63630","currency":"USD"},{"qty":10000,"price":"$0.60449","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/fd79aa8a75be198fef3cb59ecbba9f3e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy DF12NB(3.5)-40DP-0.5V(51) and how is it quoted?","answer":"Submit an RFQ for your target quantity and delivery timeline."},{"question":"What is the mated stacking height of DF12NB(3.5)-40DP-0.5V(51)?","answer":"The mated stacking height is 3.5mm. This is the fixed board-to-board gap when this header is mated with the matching DF12 receptacle. The height above board of the header alone is 0.110\" (2.80mm)."},{"question":"Is DF12NB(3.5)-40DP-0.5V(51) RoHS compliant?","answer":"Yes, DF12NB(3.5)-40DP-0.5V(51) is RoHS compliant per the lifecycle record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF12NB~13.5~2-40DP-0.5V~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/DF12NB~13.5~2-40DP-0.5V~151~2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:52:26.615Z","lastPublished":"2026-08-11T15:52:26.615Z","indexable":true}}