{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3-643818-8","brand":"TE Connectivity AMP Connectors","brandSlug":"te-connectivity-amp-connectors","productSlug":"3-643818-8","canonicalUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/3-643818-8","factsUrl":"https://icsourcedirect.com/api/mcp/products/3-643818-8","rawCanonicalId":null},"summary":{"shortDescription":"TE Connectivity MTA-156 receptacle, 8 positions, 0.156\" (3.96 mm) pitch, IDC termination, 20 AWG, tin contacts, locking ramp, closed end with polarizing key, yellow housing.","salesMarkdown":"## 20 AWG IDC Receptacle – Wire Gauge Is the Fit The 20 AWG wire gauge is the hard spec here: this housing accepts exactly 20 AWG wire, so if your harness calls for 18 or 22 AWG, you need a different MTA-156 variant. ## Locking Ramp and Polarizing Key – Vibration and Mis-Mate Protection The locking ramp fastening type gives the mated connection a positive latch – hand-tight should seal it, but the ramp holds under vibration where a friction-only fit would back off. The polarizing key (a molded bump or slot) ensures the receptacle only mates with a header that has the matching keyway, so you don't accidentally plug an 8-position into a 6-position header or mix wire gauges on the same harness. The yellow housing color is a visual cue on the assembly bench – operators can spot the 20 AWG line at a glance.","metaTitle":"TE 3-643818-8 MTA-156 Receptacle, 8 Pos, 20 AWG IDC","metaDescription":"TE MTA-156 8-position IDC receptacle, 20 AWG, tin contacts, locking ramp, closed end with polarizing key. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":"MTA-156","packageCase":null,"mountingType":null,"rohsStatus":"RoHS 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":"8","Contact Finish Thickness":"80.0µin (2.03µm)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7600","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.76000","currency":"USD"},{"qty":10,"price":"$0.73900","currency":"USD"},{"qty":25,"price":"$0.73560","currency":"USD"},{"qty":50,"price":"$0.71100","currency":"USD"},{"qty":100,"price":"$0.59610","currency":"USD"},{"qty":250,"price":"$0.55884","currency":"USD"},{"qty":500,"price":"$0.52778","currency":"USD"},{"qty":1000,"price":"$0.46259","currency":"USD"},{"qty":2500,"price":"$0.43776","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/ad26fc9853a9d4a4928ffe54fdc804e3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What wire gauge does 3-643818-8 accept?","answer":"3-643818-8 is rated for 20 AWG wire only – the IDC slot is sized for that gauge. Using a different wire size will not terminate correctly."},{"question":"Does 3-643818-8 have a closed end and polarizing key?","answer":"Yes – the housing features both a closed end (prevents wire push-through) and a polarizing key (prevents mis-mating with unkeyed headers)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/3-643818-8","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/3-643818-8 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}}