{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0039012126","brand":"Molex","brandSlug":"molex","productSlug":"0039012126","canonicalUrl":"https://icsourcedirect.com/molex/0039012126","factsUrl":"https://icsourcedirect.com/api/mcp/products/0039012126","rawCanonicalId":null},"summary":{"shortDescription":"Molex Mini-Fit Jr 5559 series, 0039012126, plug housing, 12 positions, 2 rows, 4.20mm pitch, 4.20mm row spacing, panel mount snap-in, crimp termination, locking ramp, ivory PA66, -40°C to 105°C.","salesMarkdown":"It carries a 4.20mm pitch and matching 4.20mm row spacing — the standard Mini-Fit Jr footprint that mates with the 5557 receptacle housing. You need the matching 5556-series male crimp terminals (typically Molex 44476-1112 or equivalent for 18-24 AWG) to populate the cavities. For a 12-circuit harness, that is twelve terminals, twelve wire seals if the application is sealed, and the 5557 receptacle on the other end. ## Panel-Mount Fit and Board Layout This is a panel-mount, snap-in plug — it clips into a rectangular cutout in the enclosure wall or a bulkhead, not onto a PCB. The locking ramp faces outward from the panel; make sure the cutout orientation matches the ramp direction so the latch engages when the receptacle is pushed home. It is a current-production part from the Mini-Fit Jr 5559 line, which is one of Molex's highest-volume power connector families.","metaTitle":"Molex Mini-Fit Jr 0039012126, 12-Position Plug Housing","metaDescription":"Molex 0039012126 Mini-Fit Jr 5559 series plug housing, 12 circuits, 4.20mm pitch, locking ramp. Panel-mount, crimp termination. Contacts not included. RoHS3.","metaKeywords":null},"attributes":{"series":"Mini-Fit Jr 5559","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Wire-to-Board Connectors","Connector Housings"],"specifications":{"Mfr":"Molex","Note":"Contacts Not Included","Color":"Ivory","Pitch":"0.165\\\" (4.20mm)","Series":"Mini-Fit Jr 5559","Package":"Bulk","Features":"-","Row Spacing":"0.165\\\" (4.20mm)","Contact Type":"Male Pin","Mounting Type":"Panel Mount, Snap-In","Connector Type":"Plug","Fastening Type":"Locking Ramp","Number of Rows":"2","Product Status":"Active","lifecycle_stage":"unknown","Base Product Number":"003901","Contact Termination":"Crimp","Insulation Material":"Polyamide (PA66), Nylon 6/6","Number of Positions":"12","Operating Temperature":"-40°C ~ 105°C"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.2000","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.20000","currency":"USD"},{"qty":10,"price":"$0.99400","currency":"USD"},{"qty":100,"price":"$0.82820","currency":"USD"},{"qty":1000,"price":"$0.66256","currency":"USD"},{"qty":2500,"price":"$0.60044","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/36cce23338a4834045dafbe3db23929f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy Molex 0039012126 and get a price?","answer":"Submit a quote request with your target quantity and we will confirm current pricing and availability."},{"question":"What contacts are compatible with Molex 0039012126?","answer":"The 0039012126 accepts 5556-series male crimp terminals, typically Molex 44476-1112 for 18-24 AWG wire. The housing does not include contacts — you must order the terminals separately to build a complete harness."},{"question":"Is 0039012126 obsolete or active?","answer":"The 0039012126 is an active, current-production part. It is ROHS3 compliant and still widely specified in new harness designs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/molex/0039012126","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/0039012126 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}}