{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FX4B1-20S-1.27SV(71)","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"FX4B1-20S-1.27SV~171~2","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/FX4B1-20S-1.27SV~171~2","factsUrl":"https://icsourcedirect.com/api/mcp/products/FX4B1-20S-1.27SV(71)","rawCanonicalId":null},"summary":{"shortDescription":"Hirose FX4 series receptacle, center strip contacts, 20 positions, 2 rows, 0.050\" (1.27 mm) pitch, 0.197\" (5.00 mm) stack height, surface mount, gold-plated contacts, tray.","salesMarkdown":"## Board-Stacking Fit for a 5.00 mm Gap The Hirose FX4B1-20S-1.27SV(71) is a 20-position receptacle from the FX4 series of mezzanine board-to-board connectors. It mates with the corresponding FX4 header (outer shroud contacts) to complete the board-to-board interconnect. ## Cross-Shop: FX4A1-20S vs FX4B1-20S The FX4A1-20S-1.27SV(71) is a direct functional peer — same 20 positions, same 0.050\" (1.27 mm) pitch, same 0.197\" (5.00 mm) stack height, same gold plating thickness. The only difference is the base product number (FX4A vs FX4B). Both are active, both are receptacles with center strip contacts. If one is on allocation or has a lead-time gap, the other is a drop-in alternative for the same board footprint and mating header. Confirm the specific part marking on your BOM before swapping, but the mechanical and electrical interface is identical.","metaTitle":"Hirose FX4B1-20S-1.27SV(71) Receptacle, 20 Pos, 0.050\" Pitch","metaDescription":"Hirose FX4 series receptacle, 20 positions, 0.050\" (1.27 mm) pitch, 5.00 mm stack height, SMT, gold contacts. Active production, RoHS. 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":"Board Guide","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":"FX4B","Number of Positions":"20","Mated Stacking Heights":"-","Contact Finish Thickness":"8.00µin (0.203µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.0500","stockQuantity":0,"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 FX4B1-20S-1.27SV(71)?","answer":"Submit a request for current pricing and availability — confirmed at quote time."},{"question":"What is the mated stacking height for FX4B1-20S-1.27SV(71)?","answer":"The height above board for this receptacle is 0.197\" (5.00 mm). When mated with the corresponding FX4 header, the total stack height between the two PCBs is determined by the sum of the receptacle height and the header height — check the header's height spec for the full z-axis budget."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/FX4B1-20S-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/FX4B1-20S-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}}