{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6N138W","brand":"onsemi","brandSlug":"onsemi","productSlug":"6N138W","canonicalUrl":"https://icboms.com/onsemi/6N138W","factsUrl":"https://icboms.com/api/mcp/products/6N138W","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 6N138W Optoisolator, DC Input, Darlington with Base Output, 1 Channel, 2500Vrms Isolation, 300% Min CTR, Through Hole 8-DIP (0.400\", 10.16mm), Tube.","salesMarkdown":"The 6N138W: Sourcing this part now runs through independent distribution and surplus channels. Availability is lot-specific and confirmed at RFQ — no stock-holding claim is made here. ## Key parametrics for BOM fit This is a single-channel optoisolator with a DC input and a Darlington with Base output. The minimum current transfer ratio (CTR) is 300% at a forward current of 1.6 mA, meaning the output can sink significantly more current than the LED drives — useful for driving logic inputs or relays directly from a low-current signal. Switching speed is specified at 1.5 µs turn-on and 7 µs turn-off typical. This is not a high-speed digital isolator; it suits low-frequency signal isolation, status feedback, and DC-level translation where the 7 µs fall time is within the system timing budget. Rated for 2500 Vrms isolation, the 6N138W provides basic galvanic isolation between input and output circuits in industrial control, PLC I/O modules, and motor drive feedback paths where the operating voltage does not exceed the isolation rating. Supplied in Tube packaging, the 8-DIP (0.400\", 10.16mm) body width requires a 0.100-inch pitch through-hole layout. The 8-MDIP supplier device package is the same mechanical outline — confirm the hole diameter and pad spacing against your existing DIP-8 footprint. Maximum forward current (If) is 20 mA DC; the typical forward voltage (Vf) is 1.3 V. The output side can sink up to 60 mA per channel at a maximum output voltage of 7 V — the Darlington pair provides high current gain but limits the output voltage swing to 7 V, so it cannot drive 24 V logic directly without an external pull-up or level shifter.","metaTitle":"onsemi 6N138W Optoisolator, Darlington Output, 2500Vrms","metaDescription":"onsemi 6N138W optoisolator, DC input, Darlington with Base output, 300% min CTR, 2500Vrms isolation, -40°C to 85°C. Obsolete — sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","Input Type":"DC","Output Type":"Darlington with Base","Mounting Type":"Through Hole","Package / Case":"8-DIP (0.400\\\", 10.16mm)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"6N138","Voltage - Isolation":"2500Vrms","Vce Saturation (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Rise / Fall Time (Typ)":"-","Voltage - Output (Max)":"7V","Supplier Device Package":"8-MDIP","Current - Output / Channel":"60mA","Current Transfer Ratio (Max)":"-","Current Transfer Ratio (Min)":"300% @ 1.6mA","Voltage - Forward (Vf) (Typ)":"1.3V","Turn On / Turn Off Time (Typ)":"1.5µs, 7µs","Current - DC Forward (If) (Max)":"20 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b62d34c60f4ce21d8bd4b22e173d60f9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 6N138W in this Optoisolators family?","answer":"No official pin-compatible alternative or second-source is documented by onsemi for the 6N138W. The base product number 6N138 covers the same die in a standard-width DIP package, but the 6N138W uses the wider 0.400-inch body. For a drop-in replacement, verify the PCB footprint and the 8-MDIP package dimensions against any candidate part."},{"question":"What is 6N138W's listed input type on this Optoisolators line?","answer":"The input type is DC. The LED is driven by a DC forward current, with a maximum rating of 20 mA and a typical forward voltage of 1.3 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/6N138W","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/6N138W when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:24:20.106Z","lastPublished":"2026-07-21T06:24:20.106Z","indexable":true}}