{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BM10B(0.8)-40DP-0.4V(51)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"BM10B~10.8~2-40DP-0.4V~151~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BM10B~10.8~2-40DP-0.4V~151~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/BM10B(0.8)-40DP-0.4V(51)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose BM10 series header, outer shroud contacts, 40 positions, 2 rows, 0.016\" (0.40mm) pitch, surface mount, gold contact finish, 0.025\" (0.63mm) above board, 0.8mm mated stacking height, solder retention.","salesMarkdown":"## Board-Stacking Selection: 0.4mm Pitch, 40 Positions, 0.8mm Mated Height The Hirose BM10B(0.8)-40DP-0.4V(51) is a 40-position header with outer shroud contacts from the BM10 series, designed for board-to-board mezzanine stacking at a mated height of 0.8mm. Its 0.016\" (0.40mm) pitch and dual-row layout pack 40 signal paths into a compact footprint suited for space-constrained portable electronics, handheld devices, and LCD panel interconnects. The header stands 0.025\" (0.63mm) above the board after reflow, and the solder retention feature holds the part in place during SMT assembly and resists shear from the mating receptacle. ## Pitch, Profile, and Contact Plating At 0.40mm pitch, the trace routing between pads is tight — expect 0.2mm trace and space on standard PCB fabrication limits. The 0.63mm above-board height combined with the 0.8mm mated stack height means the mating receptacle sits just 0.17mm above the header body, leaving minimal z-height clearance. Gold contact finish at 2.00µin thickness is a flash plating — adequate for a few mating cycles during manufacturing and test, but not rated for repeated field disconnect. The outer shroud contact design mates with a corresponding BM10 receptacle that has contacts on the outer shell, not a conventional female socket. ## Position Count Comparison Within the BM10 Series The 40-position BM10B(0.8)-40DP-0.4V(51) is the highest circuit-count member in the BM10 series that shares the same 0.40mm pitch, 0.63mm above-board height, and gold flash plating. The 34-position BM10B(0.8)-34DP-0.4V(51) and 30-position BM10B(0.8)-30DP-0.4V(51) are identical in every other dimension — the only difference is the number of signal paths.","metaTitle":"Hirose BM10B(0.8)-40DP-0.4V(51) 40-Pos 0.4mm Pitch Header","metaDescription":"Hirose BM10B(0.8)-40DP-0.4V(51) header, 40 positions, 0.016\" (0.40mm) pitch, gold contacts, 0.8mm mated stack height. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"BM10","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Board-to-Board Connectors","Mezzanine & Stacking Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Pitch":"0.016\\\" (0.40mm)","Series":"BM10","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":"0.025\\\" (0.63mm)","Base Product Number":"BM10B","Number of Positions":"40","Mated Stacking Heights":"0.8mm","Contact Finish Thickness":"2.00µin (0.051µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4433","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.14000","currency":"USD"},{"qty":1,"price":"$0.97000","currency":"USD"},{"qty":10,"price":"$0.96300","currency":"USD"},{"qty":10,"price":"$0.81700","currency":"USD"},{"qty":25,"price":"$0.92320","currency":"USD"},{"qty":25,"price":"$0.78320","currency":"USD"},{"qty":50,"price":"$0.90360","currency":"USD"},{"qty":50,"price":"$0.76660","currency":"USD"},{"qty":100,"price":"$0.73330","currency":"USD"},{"qty":100,"price":"$0.86440","currency":"USD"},{"qty":250,"price":"$0.78576","currency":"USD"},{"qty":250,"price":"$0.66660","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/22208dcc3d2a13238918d2f7fa265a2b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the mating connector for BM10B(0.8)-40DP-0.4V(51)?","answer":"This header mates with a corresponding BM10 series receptacle that has outer shroud contacts, designed for a 0.8mm mated stacking height. The mating half is a 40-position receptacle from the same BM10 series with the same 0.40mm pitch."},{"question":"Is BM10B(0.8)-40DP-0.4V(51) RoHS compliant?","answer":"Yes, the BM10B(0.8)-40DP-0.4V(51) is ROHS3 Compliant per the manufacturer listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BM10B~10.8~2-40DP-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/BM10B~10.8~2-40DP-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}}