{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BM28B0.6-40DS/2-0.35V(53)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"BM28B0.6-40DS-2-0.35V~153~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BM28B0.6-40DS-2-0.35V~153~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/BM28B0.6-40DS%2F2-0.35V(53)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose BM28 series receptacle, center strip contacts, 40 positions, 0.014\" (0.35mm) pitch, dual-row, 0.024\" (0.61mm) height above board, surface mount, gold contact finish 1.97µin, solder retention.","salesMarkdown":"## Board-Stacking Interconnect for Dense Signal Buses The Hirose BM28B0.6-40DS/2-0.35V(53) is a 40-position receptacle from the BM28 series, designed as a center strip contact connector for board-to-board mezzanine stacking. It carries a 0.014\" (0.35mm) pitch across two rows, with a mated stacking height of 0.6mm — the tightest z-budget in the series, sized for ultra-thin portable devices and compact module interconnects where every tenth of a millimeter matters. The gold-plated contacts (1.97µin finish) and solder retention features make this a production-grade SMT part for high-density signal routing, not a field-serviceable power interconnect. ## What the 0.35mm Pitch and 0.6mm Stack Height Mean for Layout The 0.014\" (0.35mm) pitch is the dominant routing constraint — trace widths and via keep-outs on the board must be designed for this density, and the 0.024\" (0.61mm) height above board means the connector sits flush against the PCB surface, leaving almost no clearance for passives underneath. The 0.6mm mated stacking height is the fixed z-axis dimension: the opposing board must be spaced exactly 0.6mm from the main board, with no adjustability.","metaTitle":"Hirose BM28B0.6-40DS/2-0.35V(53) Receptacle, 40 Pos","metaDescription":"Hirose BM28 series 40-position receptacle, 0.35mm pitch, 0.6mm stacking height. Gold contacts, SMT with solder retention.","metaKeywords":null},"attributes":{"series":"BM28","packageCase":null,"mountingType":null,"rohsStatus":"RoHS Compliant","productStatus":"Active","categoryPath":["Board-to-Board Connectors","Mezzanine & Stacking Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Pitch":"0.014\\\" (0.35mm)","Series":"BM28","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"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":"0.024\\\" (0.61mm)","Base Product Number":"BM28B0.6","Number of Positions":"40","Mated Stacking Heights":"0.6mm","Contact Finish Thickness":"1.97µin (0.050µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4700","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.47000","currency":"USD"},{"qty":10,"price":"$1.28200","currency":"USD"},{"qty":25,"price":"$1.22720","currency":"USD"},{"qty":50,"price":"$1.19980","currency":"USD"},{"qty":100,"price":"$1.14530","currency":"USD"},{"qty":250,"price":"$1.03624","currency":"USD"},{"qty":500,"price":"$0.95444","currency":"USD"},{"qty":1000,"price":"$0.81810","currency":"USD"},{"qty":2000,"price":"$0.79083","currency":"USD"},{"qty":3000,"price":"$0.76356","currency":"USD"},{"qty":5000,"price":"$0.72538","currency":"USD"},{"qty":10000,"price":"$0.70902","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/ca6449a4c8557efb9db70d5c533cefd3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the stacking height for BM28B0.6-40DS/2-0.35V(53)?","answer":"The mated stacking height is 0.6mm, with the connector sitting 0.024\" (0.61mm) above the board surface."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/BM28B0.6-40DS-2-0.35V~153~2","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/BM28B0.6-40DS-2-0.35V~153~2 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}}