{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6N139M","brand":"onsemi","brandSlug":"onsemi","productSlug":"6N139M","canonicalUrl":"https://icboms.com/onsemi/6N139M","factsUrl":"https://icboms.com/api/mcp/products/6N139M","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 6N139M, single-channel DC-input Darlington optocoupler, 5000Vrms isolation, 500% min CTR at 1.6mA, 18V output max, 60mA output current, 8-DIP through-hole package, tube, -40°C to 100°C.","salesMarkdown":"## 5 kVrms galvanic isolation for industrial signal paths The 6N139M from onsemi is a single-channel Darlington-output optocoupler rated for 5000Vrms isolation — the spec that matters for breaking ground loops between a 24 V PLC input module and the backplane logic. The 8-DIP through-hole package (0.300-inch body width) mates with standard DIP sockets or solders directly into plated-through holes, common on industrial I/O cards and motor-drive control boards. The Darlington output with a separate base pin allows the designer to add an external pull-down resistor to adjust the switching threshold or to disable the output during power-up sequencing. ## CTR floor and timing for the BOM trade-off Minimum current transfer ratio of 500% at 1.6 mA forward current means the output can sink 60 mA while the LED is driven by less than 2 mA from a 3.3V or 5V logic pin — no external transistor needed. Turn-on time is 240 ns typical, turn-off is 1.3 µs. The asymmetry is inherent to the Darlington output — the base storage delay dominates the turn-off. For a PLC input sampling at 1 kHz or a relay coil driver, that 1.3 µs off-time is invisible. For a PWM signal above a few kHz, the duty-cycle distortion from the asymmetry needs a budget check. ## Active production, ROHS3, and sourcing posture Surface-mount siblings (6N139SVM, 6N139SDM) share the same die and isolation rating but come in SMD wide-body packages. Quoted to order against BOM quantity. The tube quantity is typically 50 per tube for this package; factor that into the pick-and-place or hand-assembly yield if ordering partial tubes. ## Package and footprint fit for through-hole assembly 8-DIP (0.300-inch, 7.62 mm row spacing) — the standard 0.100-inch pitch DIP footprint. The 8-DIP supplier device package is the same body as the 6N139 in the same tube. The base pin (pin 6 on the Darlington) is left open or pulled to ground; it is not a no-connect. If the layout already uses a 6N138 socket, check the pinout — the 6N139 base pin replaces the 6N138's separate photodiode and transistor output, so the external resistor network changes.","metaTitle":"6N139M onsemi Optoisolator 5kVrms Darlington 8-DIP Tube","metaDescription":"onsemi 6N139M single-channel optocoupler with 5000Vrms isolation, 500% min CTR at 1.6mA, Darlington output with base pin. Active, ROHS3, -40°C to 100°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","Input Type":"DC","Output Type":"Darlington with Base","Mounting Type":"Through Hole","Package / Case":"8-DIP (0.300\\\", 7.62mm)","Product Status":"Active","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"6N139","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"-","Operating Temperature":"-40°C ~ 100°C","Rise / Fall Time (Typ)":"-","Voltage - Output (Max)":"18V","Supplier Device Package":"8-DIP","Current - Output / Channel":"60mA","Current Transfer Ratio (Max)":"-","Current Transfer Ratio (Min)":"500% @ 1.6mA","Voltage - Forward (Vf) (Typ)":"1.3V","Turn On / Turn Off Time (Typ)":"240ns, 1.3µs","Current - DC Forward (If) (Max)":"20 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3000","priceTiers":[{"qty":1,"price":"$0.82000","currency":"USD"},{"qty":10,"price":"$0.53600","currency":"USD"},{"qty":100,"price":"$0.35120","currency":"USD"},{"qty":1000,"price":"$0.27724","currency":"USD"},{"qty":2000,"price":"$0.25876","currency":"USD"},{"qty":5000,"price":"$0.24952","currency":"USD"},{"qty":10000,"price":"$0.24582","currency":"USD"},{"qty":25000,"price":"$0.24028","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/646a30e661680f909facce39eb3cee6c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/6N139M/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to the 6N139M?","answer":"The 6N139VM is the same die and isolation rating in a through-hole DIP package — identical DC input, Darlington output with base, 5000Vrms isolation, and same CTR/timing. The 'M' and 'VM' suffixes denote different onsemi manufacturing site codes; electrically they are interchangeable. For surface-mount designs, the 6N139SVM and 6N139SDM are the SMD equivalents."},{"question":"Can the 6N139M replace the 6N139?","answer":"Yes — the 6N139M is a variant of the base 6N139. The electrical ratings (isolation, CTR, timing, output voltage/current) are identical. The 'M' suffix indicates through-hole DIP in tube packaging; the base 6N139 may also ship in tube or bulk. Confirm the package and tube quantity match your BOM line, but the die and performance are the same."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/6N139M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/6N139M when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}