{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"644751-2","brand":"TE Connectivity AMP Connectors","brandSlug":"te-connectivity-amp-connectors","productSlug":"644751-2","canonicalUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/644751-2","factsUrl":"https://icsourcedirect.com/api/mcp/products/644751-2","rawCanonicalId":null},"summary":{"shortDescription":"TE Connectivity AMP MTA-156 unshrouded header, 2 positions, 0.156\" (3.96mm) pitch, right-angle through-hole, tin-plated male pins, UL94 V-0, 600VAC, -55°C to 105°C.","salesMarkdown":"## 0.156\" pitch, 2-position unshrouded header for board-to-wire links The 644751-2: Its 0.156\" (3.96mm) pitch sets the PCB footprint and the per-contact current ceiling, which varies by wire gauge. The 0.390\" (9.91mm) mating pin length provides ample engagement depth for standard MTA-156 crimp receptacles, while the 0.175\" (4.45mm) post length suits typical 1.6mm-thick PCBs. Unshrouded design gives direct access to the pins for mating, but lacks the polarisation key of a shrouded header — verify the mating housing orientation during assembly to avoid reverse-mating. The closest functional sibling is the 640385-2 — same 2-position, right-angle, unshrouded MTA-156 header — which can serve as an AVL alternate if the 644751-2 lead time extends. ## Unshrouded vs shrouded: when the keying matters The 644751-2 is unshrouded, while the 644752-4 in the same series is shrouded with a friction lock. The shrouded version adds polarisation and a locking ramp, which prevents reverse-mating and holds the connector pair under vibration. For a fixed harness in a low-vibration cabinet, the unshrouded 644751-2 is simpler and lower-cost; for a field-service cable that gets cycled regularly, the shrouded 644752-4 is the safer choice.","metaTitle":"644751-2 TE Connectivity MTA-156 Header 2POS 3.96mm Right","metaDescription":"644751-2 TE Connectivity AMP MTA-156 unshrouded header, 2 positions, 0.156\" pitch, right-angle through-hole, tin-plated, UL94 V-0.","metaKeywords":null},"attributes":{"series":"MTA-156","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Pin Headers, Sockets & Housings","Pin Headers"],"specifications":{"Mfr":"TE Connectivity AMP Connectors","Style":"Board to Cable/Wire","Series":"MTA-156","Package":"Bulk","Features":"-","Shrouding":"Unshrouded","Termination":"Solder","Applications":"General Purpose, Industrial","Contact Type":"Male Pin","Contact Shape":"Square","Mounting Type":"Through Hole, Right Angle","Connector Type":"Header","Fastening Type":"-","Number of Rows":"1","Pitch - Mating":"0.156\\\" (3.96mm)","Product Status":"Active","Voltage Rating":"600VAC","lifecycle_stage":"unknown","Contact Material":"Copper Alloy","Insulation Color":"Natural","Insulation Height":"0.125\\\" (3.18mm)","Ingress Protection":"-","Base Product Number":"644751","Insulation Material":"Thermoplastic, Glass Filled","Number of Positions":"2","Row Spacing - Mating":"-","Contact Finish - Post":"Tin","Contact Length - Post":"0.175\\\" (4.45mm)","Current Rating (Amps)":"Varies by Wire Gauge","Operating Temperature":"-55°C ~ 105°C","Mated Stacking Heights":"-","Overall Contact Length":"-","Contact Finish - Mating":"Tin","Contact Length - Mating":"0.390\\\" (9.91mm)","Number of Positions Loaded":"All","Material Flammability Rating":"UL94 V-0","Contact Finish Thickness - Post":"-","Contact Finish Thickness - Mating":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3700","priceTiers":[{"qty":1,"price":"$0.37000","currency":"USD"},{"qty":10,"price":"$0.33300","currency":"USD"},{"qty":100,"price":"$0.27790","currency":"USD"},{"qty":500,"price":"$0.23620","currency":"USD"},{"qty":1000,"price":"$0.20701","currency":"USD"},{"qty":5000,"price":"$0.18478","currency":"USD"},{"qty":10000,"price":"$0.17195","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/35932fe046d4d4e2cae4e1e99d2494c7.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/644751-2/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 644751-2 and how is it quoted?","answer":"The 644751-2 is sourced through independent distribution against a BOM quantity."},{"question":"Is 644751-2 shrouded or unshrouded?","answer":"It is unshrouded, meaning the male pins are exposed without a surrounding wall. This allows direct mating with MTA-156 crimp receptacles but lacks polarisation keying — verify orientation during assembly."},{"question":"What is the pitch of 644751-2?","answer":"The pitch is 0.156\" (3.96mm), which sets the PCB footprint and the per-contact current ceiling."},{"question":"Does 644751-2 have an equivalent or alternative part?","answer":"The closest functional alternative is the 640385-2 — same 2-position, right-angle, unshrouded MTA-156 header from TE. It can serve as an AVL alternate if the 644751-2 lead time extends."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/644751-2","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/644751-2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:52:26.615Z","lastPublished":"2026-08-11T15:52:26.615Z","indexable":true}}