{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3-643818-4","brand":"TE Connectivity AMP Connectors","brandSlug":"te-connectivity-amp-connectors","productSlug":"3-643818-4","canonicalUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/3-643818-4","factsUrl":"https://icsourcedirect.com/api/mcp/products/3-643818-4","rawCanonicalId":null},"summary":{"shortDescription":"TE Connectivity MTA-156 receptacle, 3-643818-4, 4 positions, 0.156\" (3.96mm) pitch, 1 row, IDC termination, tin contacts, free-hanging, locking ramp, yellow, bulk.","salesMarkdown":"The TE Connectivity MTA-156 3-643818-4 is a 4-position, single-row receptacle that terminates 20 AWG discrete or ribbon cable via insulation-displacement contacts — no crimp tool, no wire stripping. The 0.156\" (3.96mm) pitch is wider than the common 0.100\" IDC format, so it won't fit a standard 0.100\" header footprint; it mates with the matching MTA-156 pin header. The closed-end housing prevents the cable from pushing through, and the polarizing key ensures the connector can only be mated one way — a real time-saver on a harness assembly line where orientation mistakes cost rework. ## Why the Locking Ramp and Thick Tin Plating Matter for Harness Duty The locking ramp gives an audible click when the receptacle fully seats on the header — that click is the primary retention in a free-hanging harness, and it holds against vibration better than a friction-only fit. For a 20 AWG wire in a control cabinet or appliance harness, that thickness buys margin against tin whisker concerns in moderate-temperature environments.","metaTitle":"TE MTA-156 3-643818-4 Receptacle, 4 Pos, IDC, 20 AWG","metaDescription":"TE MTA-156 3-643818-4 receptacle, 4 positions, 0.156\" pitch, IDC termination for 20 AWG discrete or ribbon cable. Tin contacts, locking ramp, closed end.","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":"Yellow","Pitch":"0.156\\\" (3.96mm)","Series":"MTA-156","Package":"Bulk","Features":"Closed End, Polarizing Key","Wire Type":"Discrete or Ribbon Cable","Wire Gauge":"20 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":"643818","Number of Positions":"4","Contact Finish Thickness":"80.0µin (2.03µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4800","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.48000","currency":"USD"},{"qty":10,"price":"$0.44600","currency":"USD"},{"qty":25,"price":"$0.44400","currency":"USD"},{"qty":50,"price":"$0.43260","currency":"USD"},{"qty":100,"price":"$0.37110","currency":"USD"},{"qty":250,"price":"$0.33564","currency":"USD"},{"qty":500,"price":"$0.31700","currency":"USD"},{"qty":1000,"price":"$0.27785","currency":"USD"},{"qty":2500,"price":"$0.27412","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/ad26fc9853a9d4a4928ffe54fdc804e3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 3-643818-4?","answer":"The 0.156\" (3.96mm) pitch and IDC termination for 20 AWG are specific to the MTA-156 series; any alternative must match those parameters and the 4-position count. Verify compatibility against the mating header before substituting."},{"question":"What compliance documentation does TE provide for 3-643818-4?","answer":"The 3-643818-4 is ROHS3 compliant. TE Connectivity provides the standard RoHS declaration and material compliance data sheet for the MTA-156 series upon request through the supply channel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/3-643818-4","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/3-643818-4 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}}