{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5120521-2","brand":"TE Connectivity AMP Connectors","brandSlug":"te-connectivity-amp-connectors","productSlug":"5120521-2","canonicalUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/5120521-2","factsUrl":"https://icsourcedirect.com/api/mcp/products/5120521-2","rawCanonicalId":null},"summary":{"shortDescription":"TE Connectivity Free Height (FH) IEEE 1386, PMC receptacle, 84 positions, 0.039\" (1.00mm) pitch, 2 rows, surface mount, gold 30.0µin, 0.212\" (5.38mm) height above board, mated stacking heights 8mm, 9mm, 10mm.","salesMarkdown":"The TE Connectivity 5120521-2 is an 84-position receptacle from the Free Height (FH) IEEE 1386, PMC series, designed as the board-side half of a mezzanine interconnect. The 0.039\" (1.00mm) pitch and dual-row layout pack 84 circuits into a compact footprint that matches the PMC form factor — the same pitch used across the FH series, so the board layout stays consistent whether you're at 64 or 84 positions. ## Stack Height Options and Board Standoff This receptacle supports three mated stacking heights — 8mm, 9mm, and 10mm — depending on which plug half you pair it with. The height above board is fixed at 0.212\" (5.38mm) for the receptacle alone; the total stack height comes from the plug's height above its own board. That gives the board layout engineer a 2 mm window to tune the z-height budget without changing the receptacle footprint. ## SMT Termination and Tape-and-Reel Packaging Surface-mount termination means this receptacle feeds directly into a standard reflow line — no through-hole wave solder step. The 84 positions at 1.00 mm pitch require a tight footprint, but the board guide helps with placement accuracy during the reflow process. ## Comparison with the Plug Mate 1-120532-2 The key difference: the plug carries 50.0µin (1.27µm) gold — thicker than the receptacle's 30.0µin — and its height above board is 0.250\" (6.35mm) versus the receptacle's 0.212\" (5.38mm). When mated, the total stack height depends on which plug variant you select; the 8mm, 9mm, and 10mm options in the receptacle's spec correspond to specific plug heights. The plug also includes a pick-and-place feature, which the receptacle lacks, and ships in a box rather than tape-and-reel. Both are active and RoHS compliant.","metaTitle":"TE 5120521-2 Free Height Receptacle, 84 Pos, 1.00mm Pitch","metaDescription":"TE Connectivity 5120521-2 Free Height (FH) IEEE 1386 receptacle, 84 positions, 0.039\" (1.00mm) pitch, SMT, gold 30.0µin, 8/9/10mm stack heights. Active, RoHS.","metaKeywords":null},"attributes":{"series":"Free Height (FH) IEEE 1386, PMC","packageCase":null,"mountingType":null,"rohsStatus":"RoHS Compliant","productStatus":"Active","categoryPath":["Board-to-Board Connectors","Mezzanine & Stacking Connectors"],"specifications":{"Mfr":"TE Connectivity AMP Connectors","Pitch":"0.039\\\" (1.00mm)","Series":"Free Height (FH) IEEE 1386, PMC","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"Board Guide","Mounting Type":"Surface Mount","Connector Type":"Receptacle, Outer Shroud Contacts","Contact Finish":"Gold","Number of Rows":"2","Product Status":"Active","lifecycle_stage":"unknown","Height Above Board":"0.212\\\" (5.38mm)","Base Product Number":"5120521","Number of Positions":"84","Mated Stacking Heights":"8mm, 9mm, 10mm","Contact Finish Thickness":"30.0µin (0.76µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.4100","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.41000","currency":"USD"},{"qty":10,"price":"$7.33100","currency":"USD"},{"qty":25,"price":"$7.13800","currency":"USD"},{"qty":50,"price":"$6.94520","currency":"USD"},{"qty":100,"price":"$6.52070","currency":"USD"},{"qty":250,"price":"$6.48216","currency":"USD"},{"qty":650,"price":"$6.09631","currency":"USD"},{"qty":1300,"price":"$5.44038","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy 5120521-2?","answer":"Submit an RFQ for your BOM quantity."},{"question":"What is the stacking height of 5120521-2?","answer":"The 5120521-2 supports mated stacking heights of 8mm, 9mm, and 10mm, depending on the plug half used. The receptacle alone sits 0.212\" (5.38mm) above the board."},{"question":"Is 5120521-2 RoHS compliant?","answer":"Yes, the 5120521-2 is RoHS compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/5120521-2","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/te-connectivity-amp-connectors/5120521-2 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}}