{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DF40TC(3.5)-40DS-0.4V(51)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"DF40TC~13.5~2-40DS-0.4V~151~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF40TC~13.5~2-40DS-0.4V~151~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/DF40TC(3.5)-40DS-0.4V(51)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose DF40T series receptacle, center strip contacts, 0.40 mm pitch, 40 positions, 2 rows, surface mount, gold contact finish, 3.5 mm mated stacking height.","salesMarkdown":"## Board-to-Board Mezzanine Connection at 0.40 mm Pitch The Hirose DF40TC(3.5)-40DS-0.4V(51) is a 40-position receptacle from the DF40T series, designed for board-to-board mezzanine stacking. Its 0.016\" (0.40 mm) pitch packs 40 contacts into two rows, making it a dense interconnect for compact handheld or portable equipment where PCB real estate is tight. The connector sits at a 3.5 mm mated stacking height — that's the z-height from the bottom of the header board to the top of the receptacle board when mated, a dimension you need to lock early in the enclosure design. At 0.40 mm pitch, the trace-and-space on the PCB needs to match — you're looking at micro-via or HDI board capability to route signals out of the inner rows. This is a center-strip contact arrangement, so the footprint is a dense rectangle of SMT pads, not staggered rows. ## Surface Mount with Pick-and-Place Features The receptacle is surface mount (SMT) with a pick-and-place cap and solder retention features — that means it's set up for automated assembly on a standard reflow line. Tape & Reel packaging feeds into the pick-and-place feeder directly. It's not built for repeated field-service disconnect/reconnect cycles. The gold provides a corrosion-resistant mating surface for signal-level currents in a clean, enclosed environment. ## Mating Plug and DF40C Cross-Reference This receptacle mates with the matching DF40T series header at the same 0.40 mm pitch and 3.5 mm stack height. The DF40TC variant is the current active version of that design.","metaTitle":"Hirose DF40TC(3.5)-40DS-0.4V(51) Receptacle, 0.40mm Pitch","metaDescription":"Hirose DF40TC(3.5)-40DS-0.4V(51) receptacle, 0.40mm pitch, 40 positions, 3.5mm stack height. SMT with gold contacts. Active — quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Board-to-Board Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Pitch":"0.016\\\" (0.40mm)","Series":"DF40T","Package":"Tape & Reel (TR)","Features":"Pick and Place, 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":"0.134\\\" (3.40mm)","Number of Positions":"40","Mated Stacking Heights":"3.5mm","Contact Finish Thickness":"1.97µin (0.050µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7718","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/ee353916a52fdc0d2aa13cbbf97c384a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the stacking height of DF40TC(3.5)-40DS-0.4V(51)?","answer":"The mated stacking height is 3.5 mm — that's the z-height from the header board to the receptacle board when the pair is mated."},{"question":"Can DF40TC(3.5)-40DS-0.4V(51) replace DF40C-40DS-0.4V(51)?","answer":"Yes, the DF40TC(3.5)-40DS-0.4V(51) is the current active replacement for the earlier DF40C-40DS-0.4V(51). Same 0.40 mm pitch, same 40 positions, same 3.5 mm stack height. The 'TC' suffix indicates a tuning-fork contact design."},{"question":"Is DF40TC(3.5)-40DS-0.4V(51) RoHS compliant?","answer":"RoHS compliance is standard for Hirose DF40 series connectors. The (51) suffix in the order code typically indicates a RoHS-compliant version. Confirm with the manufacturer's compliance documentation for your specific lot."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF40TC~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/DF40TC~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":"2026-08-11T15:52:26.615Z","lastPublished":"2026-08-11T15:52:26.615Z","indexable":true}}