{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"86503-166HLF","brand":"Amphenol","brandSlug":"amphenol","productSlug":"86503-166HLF","canonicalUrl":"https://icsourcedirect.com/amphenol/86503-166HLF","factsUrl":"https://icsourcedirect.com/api/mcp/products/86503-166HLF","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol FCI BERGSTIK® II, 86503-166HLF, Board to Board Header, 66 Positions, 0.100\" (2.54mm) Pitch, Dual Row, Unshrouded, Through Hole, Solder Termination, 5A, 110V, Gold 30µ\" Mating Finish, UL94 V-0.","salesMarkdown":"## Board-to-Board Header, 66 Positions, 0.100\" Pitch The Amphenol FCI 86503-166HLF is a 66-position, dual-row unshrouded header from the BERGSTIK® II series. It uses the standard 0.100\" (2.54 mm) pitch on both rows and between rows, making it footprint-compatible with a wide range of legacy and current board layouts. Rated at 5 A per contact with a 30 µ\" (0.76 µm) gold mating finish, it handles repeated mating cycles and moderate signal-level current without contact fretting. The through-hole solder termination and UL94 V-0 rated black insulator suit it for card-edge and mezzanine board-to-board interconnects inside enclosed equipment. ## What the Ratings Mean for Your Fit The 0.100\" pitch is the classic industry spacing — the footprint matches standard 0.100\" grid prototyping boards and legacy backplane connectors. The 66 positions in two rows means the board footprint is 33 positions per row, which at 0.100\" spacing occupies about 3.3\" of board edge per row. The 30 µ\" gold on the mating surface is the key spec for reliability: it supports hundreds of mating cycles without exposing the phosphor bronze base metal, so this header is a good fit for field-serviceable cards or test fixtures where the connector sees regular reconnection. The 5 A per contact rating is for signal-level current — it will carry logic-level power and I/O comfortably, but it is not sized for bus-bar or main-rail power distribution. ## Sourcing and Lifecycle The 86503-166HLF carries an Active lifecycle status from Amphenol FCI — full production, no end-of-life notice on record. No official successor or cross-reference is listed, so this is the direct BOM line match for the 66-position dual-row footprint.","metaTitle":"Amphenol FCI 86503-166HLF BERGSTIK II Header, 66 Pos","metaDescription":"Amphenol FCI BERGSTIK II 86503-166HLF, 66-position dual-row unshrouded header, 0.100\" pitch, 5 A, 30 µ\" gold, UL94 V-0. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Pin Headers, Sockets & Housings"],"specifications":{"Style":"Board to Board","title":"86503-166HLF","Series":"BERGSTIK® II","Package":"Bag","Shrouding":"Unshrouded","Termination":"Solder","Contact Type":"Male Pin","Contact Shape":"Square","Mounting Type":"Through Hole","Connector Type":"Header","Fastening Type":"Push-Pull","Number of Rows":"2","Pitch - Mating":"0.100\\\" (2.54mm)","Voltage Rating":"110V","Contact Material":"Phosphor Bronze","Insulation Color":"Black","Insulation Height":"0.100\\\" (2.54mm)","Base Product Number":"86503","Number of Positions":"66","Row Spacing - Mating":"0.100\\\" (2.54mm)","Contact Length - Post":"0.120\\\" (3.05mm)","Current Rating (Amps)":"5A","Overall Contact Length":"0.470\\\" (11.94mm)","Contact Finish - Mating":"Gold or Gold, GXT™","Contact Length - Mating":"0.250\\\" (6.35mm)","Number of Positions Loaded":"All","Material Flammability Rating":"UL94 V-0","Contact Finish Thickness - Mating":"30.0µin (0.76µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.8543","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/c8f0394c32e820c9621af8eb0b9440c3.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/86503-166HLF/alternatives.json"},"ai":{"faq":[{"question":"What is the connector style of 86503-166HLF?","answer":"The listed style is Board to Board."},{"question":"What series does the 86503-166HLF belong to?","answer":"The part is in the BERGSTIK II series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/86503-166HLF","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/amphenol/86503-166HLF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-23T20:41:44.623Z","lastPublished":"2026-07-23T20:41:44.623Z","indexable":true}}