{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BM20B(0.8)-20DP-0.4V(51)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"BM20B~10.8~2-20DP-0.4V~151~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BM20B~10.8~2-20DP-0.4V~151~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/BM20B(0.8)-20DP-0.4V(51)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose BM20 series header, outer shroud contacts, 20 positions, 2 rows, 0.016\" (0.40mm) pitch, surface mount, gold plating, 0.026\" (0.65mm) height above board, 0.8mm mated stacking height.","salesMarkdown":"## Board-to-Board Mezzanine Header, 0.40mm Pitch The Hirose BM20B(0.8)-20DP-0.4V(51) is a 20-position, dual-row header from the BM20 series, designed for board-to-board mezzanine stacking. Mated stacking height is 0.8mm, which sets the board spacing for the mezzanine pair. ## 0.8mm Stacking Height and SMT Fit The 0.8mm mated stack height is the dimension that decides the board-to-board gap — design the mezzanine around that number. The 0.026\" (0.65mm) height above board means the connector sits low, leaving room for components on the underside of the top board. Against the 16-position BM20B(0.8)-16DP-0.4V(51) at the same pitch and stack height, this 20-position version adds four circuits for a wider I/O count without changing the board footprint or the z-height budget.","metaTitle":"Hirose BM20B(0.8)-20DP-0.4V(51) Header, 20 Pos, 0.40mm Pitch","metaDescription":"Hirose BM20 series header, 20 positions, 0.016\" (0.40mm) pitch, gold contacts, 0.8mm stacking height. Active production, sourced to order. RoHS compliant.","metaKeywords":null},"attributes":{"series":"BM20","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":"BM20","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":"0.026\\\" (0.65mm)","Base Product Number":"BM20B","Number of Positions":"20","Mated Stacking Heights":"0.8mm","Contact Finish Thickness":"2.00µin (0.051µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.2000","priceTiers":[{"qty":1,"price":"$1.20000","currency":"USD"},{"qty":10,"price":"$1.01500","currency":"USD"},{"qty":25,"price":"$0.97320","currency":"USD"},{"qty":50,"price":"$0.95240","currency":"USD"},{"qty":100,"price":"$0.91100","currency":"USD"},{"qty":250,"price":"$0.82820","currency":"USD"},{"qty":500,"price":"$0.74538","currency":"USD"},{"qty":1000,"price":"$0.66256","currency":"USD"},{"qty":2500,"price":"$0.60044","currency":"USD"},{"qty":8000,"price":"$0.55075","currency":"USD"},{"qty":16000,"price":"$0.53833","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/b4189a6f6c5100a5d99fc05e246b56b9.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/BM20B(0.8)-20DP-0.4V(51)/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy BM20B(0.8)-20DP-0.4V(51) with stock?","answer":"BM20B(0.8)-20DP-0.4V(51) is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is the mating height for BM20B(0.8)-20DP-0.4V(51)?","answer":"The mated stacking height is 0.8mm. This sets the board-to-board gap for the mezzanine pair."},{"question":"What receptacle mates with BM20B(0.8)-20DP-0.4V(51)?","answer":"The 0.40mm pitch and 20-position layout are the key compatibility factors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BM20B~10.8~2-20DP-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/BM20B~10.8~2-20DP-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}}