{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3-644878-3","brand":"TE Connectivity AMP Connectors","brandSlug":"te-connectivity-amp-connectors","productSlug":"3-644878-3","canonicalUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/3-644878-3","factsUrl":"https://icsourcedirect.com/api/mcp/products/3-644878-3","rawCanonicalId":null},"summary":{"shortDescription":"TE Connectivity MTA-156 IDC receptacle, 3-644878-3, 3 positions, 0.156\" (3.96mm) pitch, 1 row, female socket, IDC termination, 18 AWG, tin 80.0µin, locking ramp, closed end, polarizing key, orange, free hanging.","salesMarkdown":"## IDC Receptacle for 18 AWG Wire Harnesses The TE Connectivity 3-644878-3 is a 3-position MTA-156 IDC receptacle designed for terminating discrete or ribbon cable. The housing is orange, carries a closed end to prevent wire push-through, and includes a polarizing key that aligns with the matching header to prevent mis-mating on the assembly line. ## Termination and Retention Termination is IDC — the wire is pressed into a slotted contact beam that displaces the insulation and grips the conductor. The 80.0µin (2.03µm) tin contact finish provides enough material for the cold-flow displacement during termination and gives corrosion resistance in indoor equipment environments. ## Harness Assembly Fit This 3-position receptacle mates with any standard MTA-156 header of the same circuit count and pitch. The 0.156\" (3.96mm) pitch is the defining dimension for the board footprint — the header pins are on that spacing, so the harness plugs into a matching footprint on the PCB. The closed end means the receptacle accepts wire only from the open side, which prevents a wire from being pushed through the back of the housing during assembly. The polarizing key on the receptacle aligns with a slot on the header, so the connector can only be mated in the correct orientation.","metaTitle":"TE MTA-156 3-644878-3, 3-Pos IDC Receptacle, 0.156\" Pitch","metaDescription":"TE MTA-156 3-644878-3 3-position IDC receptacle, 0.156\" pitch, 18 AWG, tin 80.0µin, locking ramp. Active, ROHS3. Sourced to order.","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":"3","Contact Finish Thickness":"80.0µin (2.03µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5000","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.50000","currency":"USD"},{"qty":10,"price":"$0.46900","currency":"USD"},{"qty":25,"price":"$0.46680","currency":"USD"},{"qty":50,"price":"$0.45500","currency":"USD"},{"qty":100,"price":"$0.39030","currency":"USD"},{"qty":250,"price":"$0.35304","currency":"USD"},{"qty":500,"price":"$0.33344","currency":"USD"},{"qty":1400,"price":"$0.29225","currency":"USD"},{"qty":2800,"price":"$0.28833","currency":"USD"},{"qty":7000,"price":"$0.25891","currency":"USD"},{"qty":14000,"price":"$0.24275","currency":"USD"}]},"links":{"datasheetUrl":"https://www.te.com/usa-en/product-3-644878-3.datasheet.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can 3-644878-3 be used with ribbon cable?","answer":"Yes, the 3-644878-3 is rated for use with discrete or ribbon cable, terminated via IDC."},{"question":"Is 3-644878-3 RoHS compliant?","answer":"Yes, the 3-644878-3 is ROHS3 Compliant."},{"question":"What is the pitch of 3-644878-3?","answer":"The pitch is 0.156\" (3.96mm), standard for the MTA-156 series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/3-644878-3","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/3-644878-3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:45.458Z","lastPublished":"2026-07-17T19:50:45.458Z","indexable":true}}