{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FX4A1-20S-1.27SV(71)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"FX4A1-20S-1.27SV~171~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/FX4A1-20S-1.27SV~171~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/FX4A1-20S-1.27SV(71)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose FX4 series receptacle, center strip contacts, 20 positions, 2 rows, 0.050\" (1.27mm) pitch, 5.00mm stack height, surface mount, gold plating.","salesMarkdown":"## Board-to-Board Stacking Fit — 0.050\" Pitch at 5.00 mm Mated Height The Hirose FX4A1-20S-1.27SV(71) is a 20-position receptacle from the FX4 series of mezzanine board-to-board connectors. It uses a center strip contact arrangement in two rows on a 0.050\" (1.27mm) pitch, with a mated stack height of 0.197\" (5.00mm). ## What the 5.00 mm Stack Height Means for Your Board Layout The 0.197\" (5.00mm) mated height is the dimension that sets the gap between the two PCBs in a mezzanine stack. The surface-mount tails reflow on the same side as other SMDs, so no through-hole solder wave is needed. ## FX4A vs FX4B — When the Board Guide Matters The FX4B1-20S-1.27SV(71) shares the same 20-position count, 0.050\" (1.27mm) pitch, 5.00mm stack height, and gold plating as this FX4A part. The difference: the FX4B adds a board guide feature — molded alignment posts on the connector body that help register the two boards during assembly. For hand-placed or low-volume builds the FX4A works fine; for automated pick-and-place with tight stack alignment, the FX4B's board guide reduces the risk of skewed mating and bent contacts.","metaTitle":"Hirose FX4A1-20S-1.27SV(71) Receptacle, 20 Pos, 0.050\" Pitch","metaDescription":"Hirose FX4 series receptacle, 20 positions, 0.050\" (1.27mm) pitch, 5.00mm stack height, SMT, gold contacts. Active lifecycle, RoHS compliant. Sourced to order.","metaKeywords":null},"attributes":{"series":"FX4","packageCase":null,"mountingType":null,"rohsStatus":"RoHS Compliant","productStatus":"Active","categoryPath":["Board-to-Board Connectors","Mezzanine & Stacking Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Pitch":"0.050\\\" (1.27mm)","Series":"FX4","Package":"Tray","Features":"-","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":"0.197\\\" (5.00mm)","Base Product Number":"FX4A","Number of Positions":"20","Mated Stacking Heights":"-","Contact Finish Thickness":"8.00µin (0.203µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.0500","stockQuantity":24,"priceTiers":[{"qty":1,"price":"$5.05000","currency":"USD"},{"qty":10,"price":"$4.58500","currency":"USD"},{"qty":25,"price":"$4.34320","currency":"USD"},{"qty":40,"price":"$4.24200","currency":"USD"},{"qty":175,"price":"$4.04000","currency":"USD"},{"qty":350,"price":"$3.53500","currency":"USD"},{"qty":525,"price":"$3.43400","currency":"USD"},{"qty":1050,"price":"$2.92900","currency":"USD"},{"qty":2450,"price":"$2.72700","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/7ed3c41db3abe26b2e7184fc8e48f780.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy FX4A1-20S-1.27SV(71)?","answer":"Submit a quote request for current pricing and availability — confirmed at quote time."},{"question":"What is the mating connector for FX4A1-20S-1.27SV(71)?","answer":"This receptacle mates with the corresponding FX4 series header — the header uses outer shroud contacts and the same 0.050\" (1.27mm) pitch and 5.00mm stack height. The FX4B3-20P-1.27SV(71) is one example of a compatible header with a 0.275\" (6.99mm) profile."},{"question":"Is FX4A1-20S-1.27SV(71) RoHS compliant?","answer":"Yes, the FX4A1-20S-1.27SV(71) is RoHS Compliant per the listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/FX4A1-20S-1.27SV~171~2","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/FX4A1-20S-1.27SV~171~2 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}}