{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SFH6186-2","brand":"Vishay","brandSlug":"vishay","productSlug":"SFH6186-2","canonicalUrl":"https://icboms.com/vishay/SFH6186-2","factsUrl":"https://icboms.com/api/mcp/products/SFH6186-2","rawCanonicalId":null},"summary":{"shortDescription":"Vishay SFH6186-2 optocoupler, single-channel transistor output, 5300Vrms isolation, 63–125% CTR at 1 mA, 4-SMD gull wing, -55 to 100°C, ROHS3, active.","salesMarkdown":"## What this opto does on the board The Vishay SFH6186-2 is a single-channel phototransistor optocoupler in a 4-SMD gull-wing package, rated for 5300Vrms isolation. It takes a DC input on the LED side and switches a phototransistor on the output side, with a current transfer ratio (CTR) binned at 63% to 125% when the forward current is 1 mA. That CTR window is what you use to calculate the LED drive current needed to guarantee a logic-level output at the load. The part is specced across -55 to 100°C, so it fits industrial and some telecom environments where the board sees temperature swings but not extended engine-bay heat. ## 5300Vrms isolation — what it buys you The 5300Vrms isolation rating is the figure a safety engineer checks first. That rating is a one-minute hipot test value; in continuous service the working voltage is lower, but the 5300Vrms mark tells you this part passed the reinforced-insulation test per IEC 60747-5-5. For a 230VAC line application, that margin is comfortable. ## CTR bin -2: what it means for a swap The -2 suffix in SFH6186-2 is the CTR bin: 63% minimum, 125% maximum at 1 mA forward current. That is a tighter spread than the -1 bin (which runs lower) and looser than the -3 or -4 bins. If your BOM calls for the -2, the CTR range is the parameter that sets the LED current and the pull-up resistor on the output. Swapping in a different bin without adjusting the drive will either under-drive the output or saturate the transistor harder than needed. The -2 is a common middle bin for general-purpose isolation where you want a predictable on-state voltage across temperature. That means it is still a normal production line at Vishay — no last-time-buy notice, no end-of-life clock. The ROHS3 compliance also clears it for markets that enforce the latest EU RoHS exemption rules. The 4-SMD gull-wing package is a surface-mount footprint, not a through-hole DIP. That means the board gets a reflow profile, not a wave-solder step. The gull-wing leads are visible for inspection after soldering, which helps in prototype builds and rework. If you are replacing a DIP-4 through-hole part, this will not drop in without a board layout change.","metaTitle":"SFH6186-2 Optoisolator, 5300Vrms, 63-125% CTR, 4-SMD","metaDescription":"SFH6186-2 Vishay optocoupler: 5300Vrms isolation, transistor output, 63-125% CTR at 1mA, -55 to 100°C, 4-SMD gull wing. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"4-SMD, Gull Wing","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5300Vrms","Vce Saturation (Max)":"400mV","Operating Temperature":"-55°C ~ 100°C","Rise / Fall Time (Typ)":"3.5µs, 5µs","Voltage - Output (Max)":"55V","Supplier Device Package":"4-SMD","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"125% @ 1mA","Current Transfer Ratio (Min)":"63% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.1V","Turn On / Turn Off Time (Typ)":"6µs, 5.5µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.90000","currency":"USD"},{"qty":10,"price":"$0.58600","currency":"USD"},{"qty":100,"price":"$0.38380","currency":"USD"},{"qty":1000,"price":"$0.30300","currency":"USD"},{"qty":2000,"price":"$0.28280","currency":"USD"},{"qty":5000,"price":"$0.27270","currency":"USD"},{"qty":10000,"price":"$0.26866","currency":"USD"},{"qty":25000,"price":"$0.26260","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4bb15ce016d1cbb8f2e268ef9c695016.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SFH6186-2 a direct replacement for SFH6186-1?","answer":"The SFH6186-1 and SFH6186-2 are the same package and pinout, but their CTR bins differ. The -1 has a lower minimum CTR; the -2 guarantees 63% minimum at 1 mA. If your circuit was designed for the -2's CTR range, the -1 may not provide enough output drive at the same LED current. Check the CTR requirement in your design before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/SFH6186-2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/SFH6186-2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}