{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"761551103","brand":"Molex","brandSlug":"molex","productSlug":"761551103","canonicalUrl":"https://icsourcedirect.com/molex/761551103","factsUrl":"https://icsourcedirect.com/api/mcp/products/761551103","rawCanonicalId":null},"summary":{"shortDescription":"Molex Impact 76155 Series, 761551103 Header, Male Pins, 120 Positions, 0.053\" (1.35mm) Pitch, 12 Rows, Press-Fit Termination, Gold 30.0µin Contact Finish, Through Hole, UL94 V-0.","salesMarkdown":"## What This Impact Header Is — and Where It Goes The Molex 761551103 is a 120-position backplane header from the Impact 76155 series, built for high-speed differential-pair routing. It packs 40 differential pairs across 12 rows at a tight 0.053\" (1.35 mm) pitch — the column pitch that defines the Impact family's density. The 30V rating signals this is a signal-path connector, not a power interconnect: every contact carries a differential signal, and the 30.0µin (0.76µm) gold plating on the mating surface is specified for the mating-cycle count a backplane lives through. The 0.053\" (1.35 mm) pitch is the tightest in the Impact series — the 12-row column layout puts 120 positions in a footprint that fits a standard backplane slot pitch. For the board layout engineer, that pitch sets the breakout channel width and the number of routing layers needed to escape all 40 differential pairs. The 12 rows are arranged as six columns of 20 contacts each (10 columns × 12 rows = 120 positions), with the differential pairs occupying the inner rows and the outer rows carrying ground returns to control crosstalk. The press-fit through-hole footprint matches the standard Impact backplane keep-out; the hole size and pad diameter are defined in the Molex product drawing for the 76155 series. This header mates with the Impact 76155 series right-angle receptacle (female) that carries the same 0.053\" column pitch and 12-row layout. The press-fit header is the backplane side; the receptacle is the daughtercard side. The mating interface is keyed by the Impact housing geometry — a standard 76155-series backplane receptacle with the same 10-column × 12-row arrangement is the correct mating half. No cross-mating with other Impact pitch variants (0.075\" or 0.085\") — the column pitch difference prevents it. ## Construction and Compliance Details The black housing colour is cosmetic but consistent across the 76155 series, which helps visual inspection during assembly.","metaTitle":"Molex Impact 761551103 Header, 120 Pos, 0.053\" Pitch","metaDescription":"Molex Impact 761551103 backplane header, 120 positions, 0.053\" (1.35mm) pitch, 12 rows, press-fit termination, gold plating. Active lifecycle, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circular Connectors","Specialty Circular"],"specifications":{"Mfr":"Molex","Color":"Black","Pitch":"0.053\\\" (1.35mm)","Series":"Impact 76155","Package":"Box","Features":"-","Termination":"Press-Fit","Mounting Type":"Through Hole","Connector Type":"Header, Male Pins","Contact Finish":"Gold","Number of Rows":"12","Product Status":"Active","Voltage Rating":"30V","Connector Style":"Impact","Connector Usage":"-","lifecycle_stage":"unknown","Number of Columns":"10","Number of Positions":"120","Current Rating (Amps)":"-","Operating Temperature":"-55°C ~ 85°C","Contact Layout, Typical":"40 Differential Pairs","Contact Finish Thickness":"30.0µin (0.76µm)","Number of Positions Loaded":"All","Material Flammability Rating":"UL94 V-0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.6800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/4354eb4eda411cc905b7f76623884ecb.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/761551103/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the Molex 761551103 available via RFQ confirmation?","answer":"The 761551103 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your BOM quantity and target lead time."},{"question":"What is the pitch of the 761551103 connector?","answer":"The pitch is 0.053\" (1.35 mm) — the column pitch that defines the Impact backplane series and dictates the board routing density for differential-pair escape."},{"question":"What are alternatives to the Molex 761551103?","answer":"The identical alternate order code is 76155-1103 — same specs, same active lifecycle, same form, fit, and function. Either number can be used; confirm the dash format your BOM system expects."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/molex/761551103","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/molex/761551103 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:51:40.457Z","lastPublished":"2026-07-22T18:51:40.457Z","indexable":true}}