{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3-644878-6","brand":"TE Connectivity AMP Connectors","brandSlug":"te-connectivity-amp-connectors","productSlug":"3-644878-6","canonicalUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/3-644878-6","factsUrl":"https://icsourcedirect.com/api/mcp/products/3-644878-6","rawCanonicalId":null},"summary":{"shortDescription":"TE Connectivity MTA-156 receptacle, 3-644878-6, 6 positions, 0.156\" (3.96mm) pitch, 1 row, IDC termination, tin contacts, 18 AWG, locking ramp, orange.","salesMarkdown":"## Harness-floor IDC for 18 AWG — what this connector is The TE Connectivity MTA-156 3-644878-6 is a 6-position receptacle that terminates 18 AWG discrete or ribbon cable through an IDC slot — no wire stripping, no crimp. It sits in the MTA-156 series at a 0.156\" (3.96mm) pitch, wider than the common 0.100\" IDC, which means the contact spacing and the wire gauge are matched for power distribution and heavier signal circuits on a harness. The housing is orange, closed-ended with a polarizing key, so the operator cannot load the wire from the wrong side or reverse the connector on the header. ## Termination and wire prep — what the press operator needs This is an IDC termination — the wire is pushed into the slot and the insulation is displaced by the tin-plated contact. 18 AWG is the specified wire gauge; the slot geometry is cut for that diameter, so stepping down to 20 AWG leaves a loose fit and stepping up to 16 AWG risks splitting the housing. The closed-end design means the wire stops at the back wall of the slot; there is no through-hole for the wire to poke out the other side. ## Contact finish and mating cycles The contact finish is tin at 80.0 µ\" (2.03 µm). That is a heavy tin layer — thick enough to survive multiple insertion and extraction cycles without the galling you get from a thin tin flash. It is not a gold contact, so it is not rated for hundreds of mate cycles in a corrosive environment, but for a harness that is mated during assembly and then stays connected for the life of the equipment, the tin finish is the standard choice. The 3-644878-6 is an active TE part, ROHS3 compliant. No official cross-reference or second-source equivalent is on record; the MTA-156 series is TE-specific tooling, so the header and receptacle are a closed system.","metaTitle":"TE MTA-156 3-644878-6, 6-Pos IDC Receptacle, 18 AWG","metaDescription":"TE MTA-156 3-644878-6 receptacle, 6 positions, 0.156\" pitch, IDC termination for 18 AWG discrete or ribbon cable, tin contacts, locking ramp, RoHS3.","metaKeywords":null},"attributes":{"series":"MTA-156","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Circular Connectors","Panel-Mount & In-Line Circular"],"specifications":{"Mfr":"TE Connectivity AMP Connectors","Color":"Orange","Pitch":"0.156\\\" (3.96mm)","Series":"MTA-156","Package":"Tape & Reel (TR) Cut Tape (CT)","Features":"Closed End, Polarizing Key","Wire Type":"Discrete or Ribbon Cable","Wire Gauge":"18 AWG","Row Spacing":"-","Contact Type":"Female Socket","Mounting Type":"Free Hanging (In-Line)","Connector Type":"Receptacle","Contact Finish":"Tin","Fastening Type":"Locking Ramp","Number of Rows":"1","Product Status":"Active","lifecycle_stage":"unknown","Cable Termination":"IDC","Base Product Number":"644878","Number of Positions":"6","Contact Finish Thickness":"80.0µin (2.03µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6050","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.85000","currency":"USD"},{"qty":1,"price":"$1.00000","currency":"USD"},{"qty":10,"price":"$0.84700","currency":"USD"},{"qty":10,"price":"$0.80800","currency":"USD"},{"qty":25,"price":"$0.77240","currency":"USD"},{"qty":25,"price":"$0.81200","currency":"USD"},{"qty":50,"price":"$0.79480","currency":"USD"},{"qty":50,"price":"$0.76160","currency":"USD"},{"qty":100,"price":"$0.66550","currency":"USD"},{"qty":100,"price":"$0.76020","currency":"USD"},{"qty":250,"price":"$0.69108","currency":"USD"},{"qty":250,"price":"$0.64064","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What wire gauge does 3-644878-6 accept?","answer":"The 3-644878-6 is specified for 18 AWG discrete or ribbon cable. The IDC slot is sized for that gauge."},{"question":"What is the locking mechanism on the 3-644878-6?","answer":"The 3-644878-6 uses a locking ramp that engages the header latch. It provides positive retention under vibration."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/3-644878-6","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/3-644878-6 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}}