{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DM3BT-DSF-PEJS","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"DM3BT-DSF-PEJS","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DM3BT-DSF-PEJS","factsUrl":"https://icsourcedirect.com/api/mcp/products/DM3BT-DSF-PEJS","rawCanonicalId":null},"summary":{"shortDescription":"Hirose DM3 Series microSD™ card connector, DM3BT-DSF-PEJS, 10 (8+2) positions, push-push, surface mount right angle, reverse bottom mount, 1.83mm height above board, gold contacts, ROHS3 compliant.","salesMarkdown":"## Board Layout Reality Check — This microSD Connector Mounts on the Bottom Edge The Hirose DM3BT-DSF-PEJS is a reverse-mount, right-angle microSD™ card connector from the DM3 series. That \"Reverse - Bottom\" mounting feature means the card slot opens on the underside of the PCB — not the top — so the card inserts from the board edge and sits flush with the bottom surface. The connector stands 1.83mm above the board, which is the critical dimension for enclosure clearance: at that height, the card body stays within the board-to-case gap without forcing a thicker chassis. It handles 10 positions arranged as 8 data/control lines plus 2 dedicated card-detect switch contacts, and uses a push-push (push-in, push-out) ejection mechanism — the standard user action for a captive card slot. ## Why the Reverse Mount Matters for Your Layout Most microSD connectors mount on the top side of the board with the slot facing up. The DM3BT-DSF-PEJS flips that: the card loads from the bottom edge, which is useful when the PCB sits against an enclosure wall and the card needs to be accessible from the outside without a cutout in the top cover. The right-angle orientation means the card lies parallel to the PCB, not perpendicular — it slides in along the board plane, so the total z-height is just the connector body plus the card thickness. For a board-to-card stack, you need about 2.5mm of clearance below the PCB to accommodate the card and the ejection travel. ## Position Count and the Switch Contacts The 10 positions are split as 8 signal/control contacts and 2 switch contacts. The switch pair is the card-detect circuit: when a card is fully inserted, the switch closes (or opens, depending on the host circuit) to signal card presence.","metaTitle":"Hirose DM3BT-DSF-PEJS microSD Connector, 1.83mm Height","metaDescription":"Hirose DM3BT-DSF-PEJS microSD push-push connector, 10 (8+2) positions, 1.83mm height, reverse bottom mount, gold contacts, ROHS3.","metaKeywords":null},"attributes":{"series":"DM3","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Card-Edge Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Series":"DM3","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"Switch","Card Type":"Secure Digital - microSD™","Ejector Side":"-","Mounting Type":"Surface Mount, Right Angle","Connector Type":"Connector and Ejector","Contact Finish":"Gold","Product Status":"Active","lifecycle_stage":"unknown","Mounting Feature":"Reverse - Bottom","Height Above Board":"0.072\\\" (1.83mm)","Base Product Number":"DM3BT","Number of Positions":"10 (8 + 2)","Contact Finish Thickness":"-","Insertion, Removal Method":"Push In, Push Out"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.5600","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.56000","currency":"USD"},{"qty":10,"price":"$2.23100","currency":"USD"},{"qty":25,"price":"$2.13600","currency":"USD"},{"qty":50,"price":"$2.08860","currency":"USD"},{"qty":100,"price":"$1.99370","currency":"USD"},{"qty":250,"price":"$1.80384","currency":"USD"},{"qty":500,"price":"$1.66144","currency":"USD"},{"qty":1200,"price":"$1.42410","currency":"USD"},{"qty":2400,"price":"$1.32916","currency":"USD"},{"qty":6000,"price":"$1.26270","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/20b8d0e5e57adc77706dc510b82ed4fd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is DM3BT-DSF-PEJS compatible with microSDHC cards?","answer":"Yes. The connector is specified for Secure Digital - microSD™ card types, which includes standard microSD and microSDHC (High Capacity) cards. The 8+2 contact arrangement follows the standard microSD pinout, so any card that fits the microSD form factor will work."},{"question":"What is the height of DM3BT-DSF-PEJS above the PCB?","answer":"The height above board is 0.072\" (1.83mm). This is the distance from the PCB surface to the top of the connector body. The card itself sits below that plane, so total z-height below the board is about 2.5mm including card thickness and ejection travel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/DM3BT-DSF-PEJS","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/DM3BT-DSF-PEJS 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}}