{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"501933-3","brand":"TE Connectivity AMP Connectors","brandSlug":"te-connectivity-amp-connectors","productSlug":"501933-3","canonicalUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/501933-3","factsUrl":"https://icsourcedirect.com/api/mcp/products/501933-3","rawCanonicalId":null},"summary":{"shortDescription":"TE Connectivity 501933-3 fiber optic adapter, duplex, multimode, converts FSD receptacle to ST receptacle, panel mount with flange, beige housing, M-keyed, includes dust caps, bulk.","salesMarkdown":"The TE Connectivity 501933-3 is a duplex multimode fiber optic adapter that converts an FSD receptacle to a pair of ST receptacles. FSD is a duplex, keyed rectangular interface used in some premises and datacom panels; ST is the bayonet-style round connector common in multimode patch cords. This adapter lets you terminate an FSD bulkhead and patch into standard ST-terminated cables without re-terminating the panel side. The housing is beige plastic, panel-mounted with a flange that secures it to a cutout in the patch panel or equipment chassis. The M-keying prevents inserting the adapter into a bulkhead keyed for a different interface. A dust cap is included on each port to keep the ferrule end-faces clean when the adapter is not mated. ## Compatibility and Cross-Shop Notes This adapter is purpose-built for the FSD-to-ST conversion — it is not a generic LC-to-ST or SC-to-ST coupler. The FSD end is a duplex, keyed rectangular interface that does not accept standard LC or SC connectors. If your panel is terminated with LC connectors, you need an LC-to-ST adapter, not this part. No pin-compatible alternative is listed in the same series; the 501933 base number covers several keying and color variants, but the FSD-to-ST conversion is specific to this order code.","metaTitle":"TE Connectivity 501933-3 FSD-to-ST Duplex Adapter, Multimode","metaDescription":"TE 501933-3 duplex multimode adapter converts FSD receptacle to ST receptacle. Panel-mount with flange, M-keyed, includes dust caps.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"TE Connectivity AMP Connectors","Mode":"Multimode","Type":"Adapter","Color":"Beige","Series":"-","Package":"Bulk","Features":"Dust Cap, M-Keyed","Mounting Type":"Panel Mount, Flange","Product Status":"Active","Simplex/Duplex":"Duplex","lifecycle_stage":"unknown","Ferrule Material":"-","Housing Material":"Plastic","Ingress Protection":"-","Base Product Number":"501933","Operating Temperature":"-","Convert To (Adapter End)":"ST Receptacle","Convert From (Adapter End)":"FSD Receptacle","Material Flammability Rating":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.6320","stockQuantity":31,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/029471879d25e4d04ecd8d0a30e59c82.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 501933-3 and what is the lead time?","answer":"Submit an RFQ for your quantity to get a firm lead time and price."},{"question":"Is the 501933-3 adapter compatible with standard LC connectors?","answer":"No. The FSD end of this adapter is a duplex, keyed rectangular interface that does not accept standard LC connectors. If you need to convert from LC to ST, select a different adapter designed for that interface."},{"question":"Does the 501933-3 come with dust caps as shown in the features?","answer":"Yes, the adapter includes dust caps on both ports to protect the ferrule end-faces from contamination when the adapter is not mated."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/te-connectivity-amp-connectors/501933-3","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/501933-3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:46:37.382Z","lastPublished":"2026-07-22T19:46:37.382Z","indexable":true}}