{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DF12NB(5.0)-40DP-0.5V(51)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"DF12NB~15.0~2-40DP-0.5V~151~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF12NB~15.0~2-40DP-0.5V~151~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/DF12NB(5.0)-40DP-0.5V(51)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose DF12 series, 0.50mm pitch, 40-position header with outer shroud contacts, 5mm mated stack height, gold-plated contacts, surface mount, solder retention, active production.","salesMarkdown":"## Board-to-board fit: pitch and stack height The DF12NB(5.0)-40DP-0.5V(51): This is a 0.50mm pitch, 40-position header from the Hirose DF12 series, designed for mezzanine stacking at a 5mm mated stack height. The pitch drives the PCB footprint density; the stack height sets the clearance between the two boards. For a 0.50mm pitch, the routing channel between pads is tight — expect a 4-layer board to fan out the inner rows. The header uses outer shroud contacts, which means the signal pins are recessed inside a plastic housing. ## Solder retention keeps the part in place The DF12NB variant adds solder retention features to the SMT pads. At 0.50mm pitch, the solder paste volume per pad is small, and the part can shift during reflow if the board isn't supported. Those retention pads — visible on the footprint drawing — hold the header in position through the solder joint's liquid phase. This is the key difference from the DF12A series, which lacks the retention pads. If your reflow process sees vibration or the board has a high component density that creates airflow shadows, the NB variant gives you a more repeatable placement yield. For applications that see frequent board swaps or field servicing, you'd want a thicker gold (15µin or more) to avoid exposing the nickel underplate after repeated wipes. But for a fixed mezzanine stack that mates once at assembly and stays, this finish is adequate.","metaTitle":"DF12NB(5.0)-40DP-0.5V(51) – Hirose DF12 0.50mm Pitch 40-Pos","metaDescription":"Hirose DF12NB(5.0)-40DP-0.5V(51): 0.50mm pitch, 40-position mezzanine header, 5mm mated stack height, gold contacts, solder retention.","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":"0.020\\\" (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":"0.169\\\" (4.30mm)","Base Product Number":"DF12N","Number of Positions":"40","Mated Stacking Heights":"5mm","Contact Finish Thickness":"8.00µin (0.203µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/49fd2758024867cba735c06911e986cb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy DF12NB(5.0)-40DP-0.5V(51)?","answer":"We source this active-production part to order. Submit an RFQ with your target quantity and packaging preference (Tape & Reel or Cut Tape) — we'll confirm current pricing and lead time from our supply network."},{"question":"What is the difference between DF12NB(5.0)-40DP-0.5V(51) and DF12A(5.0)-40DP-0.5V(51)?","answer":"The DF12NB variant includes solder retention pads on the SMT footprint, which help hold the header in place during reflow. The DF12A does not have these pads — it relies solely on the signal-pin solder joints for mechanical retention. For high-density boards with tight pad spacing, the NB version gives better placement yield."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DF12NB~15.0~2-40DP-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~15.0~2-40DP-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}}