{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"43255-0099","brand":"Molex","brandSlug":"molex","productSlug":"43255-0099","canonicalUrl":"https://icsourcedirect.com/molex/43255-0099","factsUrl":"https://icsourcedirect.com/api/mcp/products/43255-0099","rawCanonicalId":null},"summary":{"shortDescription":"Molex MLX 43255 Header, 43255-0099, 12 Position, 4 Row, 0.250\" (6.35mm) Pitch, Through Hole, Solder, Tin, 9A, 600V.","salesMarkdown":"## Design Engineering Note: Molex MLX 43255-0099 12-Circuit Header The Molex MLX 43255-0099 is a 12-position, 4-row shrouded header from the MLX 43255 series, designed for board-to-cable/wire interconnect in automotive, general-purpose, and industrial applications. It carries a 6.35mm pitch and 6.35mm row spacing, with a locking ramp for vibration-resistant mating and a board guide for alignment during assembly. Rated 9 A per circuit at 600 V, with a wide operating temperature range of -55°C to 105°C, this header is built for moderate power distribution in environments that see temperature swings and mechanical vibration. The 137.8 µin (3.50 µm) tin plating on both the mating and post surfaces provides a cost-effective contact finish for harness applications where the connector is mated infrequently — think underhood engine harnesses or industrial control cabinets. Through-hole solder termination with a 0.170\" (4.32 mm) post length suits standard PCB thicknesses. The 6.35 mm pitch and 4-row layout mean this header occupies a wider board footprint than a 2-row equivalent — plan for a keep-out zone that accommodates the full 0.550\" (13.97 mm) insulation height and the locking ramp overhang. The 600 V rating is line-to-line, not line-to-ground — the 4-wall shrouding and 6.35 mm pitch provide the creepage distance for that voltage in pollution degree 2 environments. Tin plating on the mating surface is adequate for the typical mating cycle count in harness applications (50–100 cycles), but if your design requires frequent field servicing or high-cycle automated mating, consider the gold-plated variants in the MLX 43255 series.","metaTitle":"Molex MLX 43255-0099 Header, 12 Position, 6.35mm Pitch, 9A","metaDescription":"Molex MLX 43255-0099 12-position shrouded header, 6.35mm pitch, 9A per circuit, 600V, tin-plated contacts, through-hole, UL94 V-0.","metaKeywords":null},"attributes":{"series":"MLX 43255","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Pin Headers, Sockets & Housings","Pin Headers"],"specifications":{"Style":"Board to Cable/Wire","title":"43255-0099","Series":"MLX 43255","Package":"Box","Features":"Board Guide","Shrouding":"Shrouded - 4 Wall","Termination":"Solder","description":"0.084 SERIES MLX HEADER 12CKT WI","Applications":"Automotive, General Purpose, Industrial","Contact Type":"Male Pin","Contact Shape":"Circular","Mounting Type":"Through Hole","Connector Type":"Header","Fastening Type":"Locking Ramp","Number of Rows":"4","Pitch - Mating":"0.250\\\" (6.35mm)","Voltage Rating":"600V","Contact Material":"Phosphor Bronze","Insulation Color":"Natural","Insulation Height":"0.550\\\" (13.97mm)","Insulation Material":"Polybutylene Terephthalate (PBT), Polyester","Number of Positions":"12","Row Spacing - Mating":"0.250\\\" (6.35mm)","Contact Finish - Post":"Tin","Contact Length - Post":"0.170\\\" (4.32mm)","Current Rating (Amps)":"9A","Operating Temperature":"-55°C~105°C","Contact Finish - Mating":"Tin","Number of Positions Loaded":"All","Material Flammability Rating":"UL94 V-0","Contact Finish Thickness - Post":"137.8µin (3.50µm)","Contact Finish Thickness - Mating":"137.8µin (3.50µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0900","stockQuantity":0,"priceTiers":[{"qty":31,"price":"$1.09000","currency":"USD"},{"qty":300,"price":"$1.08000","currency":"USD"},{"qty":600,"price":"$1.04000","currency":"USD"},{"qty":1200,"price":"$1.01000","currency":"USD"},{"qty":5000,"price":"$0.93000","currency":"USD"},{"qty":10000,"price":"$0.84000","currency":"USD"},{"qty":25000,"price":"$0.77000","currency":"USD"},{"qty":50000,"price":"$0.70000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the pinout of Molex 43255-0099?","answer":"The 43255-0099 is a 12-position, 4-row header with all positions loaded. The pinout follows the standard MLX 43255 series layout — the locking ramp and board guide orient the header in the mating receptacle. For exact pin numbering, refer to the manufacturer's product drawing."},{"question":"What is the pitch of Molex 43255-0099?","answer":"The mating pitch is 0.250\" (6.35 mm), with the same row spacing of 0.250\" (6.35 mm). This is a standard MLX 43255 series pitch."},{"question":"Is 43255-0099 RoHS compliant?","answer":"Yes, the 43255-0099 is ROHS3 compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/molex/43255-0099","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/43255-0099 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}}