{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"430451221","brand":"Molex","brandSlug":"molex","productSlug":"430451221","canonicalUrl":"https://icsourcedirect.com/molex/430451221","factsUrl":"https://icsourcedirect.com/api/mcp/products/430451221","rawCanonicalId":null},"summary":{"shortDescription":"Molex Micro-Fit 3.0 43045 series, 430451221, 12-circuit dual-row right-angle through-hole header, 0.118\" (3.00mm) pitch, shrouded 4-wall with locking ramp, board lock, tin-plated male pins rated 8A per circuit at 600V, insulation height 0.290\", UL94 V-0 LCP housing, ROHS3 compliant.","salesMarkdown":"## Design Engineering Note The Molex 430451221 is a 12-circuit, dual-row header from the Micro-Fit 3.0 43045 series, designed for board-to-wire power interconnects. It uses a 3.00 mm pitch, right-angle through-hole mounting, and a shrouded 4-wall housing with a locking ramp for secure mating. The tin-plated male pins are rated 8 A per circuit at 600 V, making this a mid-current power header suited for automotive, industrial, and telecom harness assemblies. The 60.0 µin tin mating finish is thick enough for repeated mating in a fixed harness but not for high-cycle field-service applications — gold-plated siblings in the same series would be a better fit for frequent disconnect duty. The board lock feature holds the header in place during wave solder, preventing skew from cable strain after assembly. ## Mating and Termination This header mates with Micro-Fit 3.0 receptacle housings (e.g., the 43025 series) that accept 20–24 AWG crimp terminals. The locking ramp on the header engages the receptacle latch for vibration-resistant retention. The through-hole solder tails are 0.125\" long, fitting standard PCB thicknesses.","metaTitle":"Molex Micro-Fit 3.0 430451221","metaDescription":"Molex 430451221 Micro-Fit 3.0 header, 12 circuits, 3.00mm pitch, right-angle through-hole, tin-plated, 8A/600V, UL94 V-0. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":"Micro-Fit 3.0 43045","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Style":"Board to Cable/Wire","title":"430451221","Series":"Micro-Fit 3.0 43045","Package":"Tray","Features":"Board Lock","Shrouding":"Shrouded - 4 Wall","Termination":"Solder","description":"CONN HEADER R/A 12POS 3MM","Applications":"Automotive, General Purpose, Industrial, Medical, Telecommunications","Contact Type":"Male Pin","Contact Shape":"Square","Mounting Type":"Through Hole, Right Angle","Connector Type":"Header","Fastening Type":"Locking Ramp","Number of Rows":"2","Pitch - Mating":"0.118\\\" (3.00mm)","Voltage Rating":"600V","Contact Material":"Brass","Insulation Color":"Black","Insulation Height":"0.290\\\" (7.37mm)","Base Product Number":"043045","Insulation Material":"Liquid Crystal Polymer (LCP), Glass Filled","Number of Positions":"12","Row Spacing - Mating":"0.118\\\" (3.00mm)","Contact Finish - Post":"Tin","Contact Length - Post":"0.125\\\" (3.18mm)","Current Rating (Amps)":"8A","Contact Finish - Mating":"Tin","Number of Positions Loaded":"All","Material Flammability Rating":"UL94 V-0","Contact Finish Thickness - Mating":"60.0µin (1.52µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.75","priceTiers":[{"qty":1,"price":"$3.75000","currency":"USD"},{"qty":10,"price":"$3.29900","currency":"USD"},{"qty":80,"price":"$2.62425","currency":"USD"},{"qty":1008,"price":"$2.17435","currency":"USD"},{"qty":5040,"price":"$1.94941","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/dfff01b2e2ed78f9b97db4b2de03830c.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/430451221/alternatives.json"},"ai":{"faq":[{"question":"What is the mating connector for 430451221?","answer":"This header mates with Micro-Fit 3.0 receptacle housings (such as the 43025 series) that accept 20–24 AWG crimp terminals with a locking ramp interface."},{"question":"What is the current rating of 430451221?","answer":"The header is rated 8 A per circuit at 600 V, with tin-plated contacts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/molex/430451221","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/430451221 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T10:44:45.277Z","lastPublished":"2026-07-16T10:44:45.277Z","indexable":true}}