{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DF40HC(3.5)-40DS-0.4V(51)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"DF40HC~13.5~2-40DS-0.4V~151~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF40HC~13.5~2-40DS-0.4V~151~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/DF40HC(3.5)-40DS-0.4V(51)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose DF40 series, DF40HC(3.5)-40DS-0.4V(51), 40 position receptacle, center strip contacts, 0.40mm pitch, dual row, surface mount, gold plated contacts, 3.5mm mated stacking height.","salesMarkdown":"The Hirose DF40HC(3.5)-40DS-0.4V(51) is a 40-position receptacle with center strip contacts from the DF40 series, designed for board-to-board mezzanine stacking at a 3.5mm mated height. ## Pitch and Footprint — the Board Layout Decision At 0.40mm pitch, this is a fine-pitch connector. The 3.5mm stacking height means the mating header sits low, so keep-out zones on the opposing board must account for the receptacle body height above the PCB at 0.134\" (3.40mm). The DF40HC(3.5)-40DS-0.4V(51) carries 40 positions. The same footprint and 3.5mm stack height is shared with the 30-position DF40HC(3.5)-30DS-0.4V(51) and the 50-position DF40HC(3.5)-50DS-0.4V(51). Gold contact finish at 2.00µin is a light flash. It handles moderate mating cycles — think assembly and occasional field service — but for high-cycle applications like battery swap or frequent reconnection, a thicker gold layer would be preferred. The gold prevents oxidation on the mating surface, keeping contact resistance stable through the connector's service life in a controlled indoor environment.","metaTitle":"Hirose DF40HC(3.5)-40DS-0.4V(51) 40 Pos 0.40mm Receptacle","metaDescription":"Hirose DF40HC(3.5)-40DS-0.4V(51) receptacle, 40 positions, 0.40mm pitch, 3.5mm stacking height, gold contacts. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":"DF40","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":"DF40","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"-","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":"0.134\\\" (3.40mm)","Base Product Number":"DF40H","Number of Positions":"40","Mated Stacking Heights":"3.5mm","Contact Finish Thickness":"2.00µin (0.051µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3600","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.36000","currency":"USD"},{"qty":10,"price":"$1.18700","currency":"USD"},{"qty":25,"price":"$1.13640","currency":"USD"},{"qty":50,"price":"$1.11100","currency":"USD"},{"qty":100,"price":"$1.06050","currency":"USD"},{"qty":250,"price":"$0.95952","currency":"USD"},{"qty":500,"price":"$0.88376","currency":"USD"},{"qty":1000,"price":"$0.75750","currency":"USD"},{"qty":2000,"price":"$0.73225","currency":"USD"},{"qty":4000,"price":"$0.70700","currency":"USD"},{"qty":6000,"price":"$0.67165","currency":"USD"},{"qty":10000,"price":"$0.65650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/aec32b0d4a5f742c03de5786d68c7607.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the stacking height of DF40HC-40DS?","answer":"The mated stacking height is 3.5mm. That is the dimension from the bottom of the receptacle PCB to the top of the mating header PCB when fully mated."},{"question":"Is DF40HC series compatible with standard DF40 series?","answer":"The DF40HC(3.5)-40DS-0.4V(51) is a member of the DF40 series with a specific 3.5mm stacking height variant. It mates with the corresponding DF40 header of the same pitch and stack height — confirm the mating half order code specifies the same 3.5mm mated height."},{"question":"Where can I buy DF40HC(3.5)-40DS-0.4V(51)?","answer":"This part is sourced to order against your BOM quantity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF40HC~13.5~2-40DS-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/DF40HC~13.5~2-40DS-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}}